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Year	Assessment Roll Hectares within Irrigation Districts ha		Area actually irrigated in the Irrigation Districts ha		Utilisation rate of Assessment Roll Hectares %		Water License Allocation for Irrigation Districts m³		Total Volume of Water Diverted to Irrigation Districts m³		Utilisation rate of water license allocation %		Total Private Hectares Irrigated ha		Total Number of Private Irrigation Licences #		Average number of Hectares per Licence ha		Total Hectares Licenced for Irrigation ha

1899				275,797,905
1900				275,797,905
1901				275,797,905
1902				275,797,905
1903				275,797,905
1904				969,014,699
1905				969,014,699
1906				969,014,699
1907				969,014,699
1908				1,154,036,975
1909				1,154,036,975
1910				1,154,036,975
1911		19,223		1,154,036,975
1912		31,039		1,154,036,975
1913		31,889		1,536,909,738
1914		37,415		1,536,909,738
1915		34,203		1,536,909,738
1916		29,800		1,536,909,738
1917		42,509		1,721,932,014
1918		61,727		1,721,932,014
1919		76,055		1,784,839,588
1920		53,410		1,784,839,588
1921		87,905		1,784,839,588
1922		97,657		1,784,839,588
1923		56,730		1,794,090,702
1924		96,405		1,794,090,702
1925		97,060		1,794,090,702
1926		107,903		1,794,090,702
1927		17,091		1,794,090,702
1928		55,393		1,794,090,702
1929		103,615		1,794,090,702
1930		136,392		1,794,090,702
1931		142,536		1,794,090,702
1932		113,656		1,794,090,702
1933		136,868		1,794,090,702
1934		132,349		1,794,090,702
1935		154,936		1,794,090,702
1936		153,235		1,794,090,702
1937		165,069		1,794,090,702
1938		163,389		1,794,090,702
1939		150,259		1,794,090,702
1940		163,887		1,794,090,702
1941		161,597		1,794,090,702
1942		139,810		1,794,090,702
1943		164,496		1,803,650,186
1944		173,919		1,803,650,186
1945		167,074		1,810,434,336
1946		171,185		1,810,434,336
1947		181,006		1,810,434,336
1948		162,752		1,810,434,336
1949		183,885		1,810,434,336
1950		181,674		2,441,245,584
1951		138,163		2,441,245,584
1952		145,335		2,441,245,584
1953		131,190		2,539,924,131
1954		184,709		2,539,924,131
1955		164,921		2,539,924,131
1956		201,217		2,539,924,131
1957		197,628		2,539,924,131
1958		199,646		2,539,924,131
1959		212,809		2,539,924,131
1960		240,703		2,539,924,131
1961		246,213		2,539,924,131
1962		255,867		2,539,924,131
1963		256,599		2,786,016,093
1964		258,151		2,786,016,093
1965		200,316		2,786,016,093
1966		199,566		2,786,016,093
1967		231,684		2,786,016,093
1968		238,126		2,786,016,093
1969		218,106		2,786,016,093
1970	279,877	231,894	82.86	2,786,016,093
1971	281,496	230,932	82.04	2,786,016,093
1972	283,065	233,182	82.38	2,786,016,093
1973	294,832	271,327	92.03	2,786,016,093
1974	346,769	285,966	82.47	2,868,659,376
1975	362,324	275,796	76.12	2,868,659,376
1976	377,823	320,195	84.75	2,868,659,376	2,075,175,310	72
1977	397,724	339,571	85.38	2,868,659,376	2,301,763,457	80
1978	407,043	311,579	76.55	2,868,659,376	1,296,015,669	45
1979	408,714	352,052	86.14	2,868,659,376	1,912,633,241	67
1980	419,729	344,921	82.18	2,868,659,376	1,994,515,466	70
1981	429,713	345,661	80.44	2,868,659,376	2,108,751,919	74
1982	439,553	365,529	83.16	2,935,267,395	1,905,034,993	65
1983	448,248	392,384	87.54	2,935,267,395	2,144,762,188	73
1984	454,294	402,818	88.67	2,935,267,395	2,484,480,356	85
1985	462,109	417,324	90.31	2,935,267,395	2,429,603,982	83
1986	468,915	418,387	89.22	2,935,267,395	2,325,678,203	79
1987	472,839	419,720	88.77	2,935,267,395	2,313,187,966	79
1988	478,418	426,001	89.04	2,935,267,395	2,923,238,480	100
1989	484,494	434,133	89.61	2,938,967,841	2,361,431,908	80
1990	492,148	443,669	90.15	2,938,967,841	2,504,275,272	85
1991	496,761	433,344	87.23	3,255,355,933	2,300,956,760	71
1992	500,988	441,071	88.04	3,321,347,211	2,301,361,342	69
1993	502,011	356,402	70.99	3,342,316,403	1,384,426,713	41
1994	504,652	447,318	88.64	3,342,316,403	2,251,253,609	67
1995	508,526	399,574	78.58	3,347,558,700	2,019,461,402	60
1996	513,197	474,089	92.38	3,433,902,429	2,446,471,846	71
1997	517,144	478,439	92.52	3,433,902,429	2,341,970,031	68	102,737	2,508	40.96	619,881
1998	519,632	467,140	89.90	3,433,902,429	2,264,850,280	66	103,273	2,523	40.93	622,905
1999	524,527	481,646	91.82	3,433,902,429	2,017,365,717	59	104,109	2,509	41.49	628,635
2000	526,489	492,496	93.54	3,433,902,429	2,786,942,438	81	112,432	2,771	40.57	638,921
2001	529,646	493,445	93.16	3,433,902,429	2,583,837,318	75	110,217	2,786	39.56	639,864
2002	535,441	495,570	92.55	3,433,902,429	1,994,187,359	58	111,531	2,808	39.72	646,972
2003	536,410	499,528	93.12	3,433,902,429	1,984,049,372	58	114,629	2,828	40.53	651,039
2004	542,182	498,658	91.97	3,453,823,161	1,768,938,774	51	115,447	2,840	40.65	657,629
2005	543,280	496,184	91.33	3,453,823,161	1,488,462,272	43	118,595	2,864	41.41	661,875
2006	544,025	488,568	89.81	3,453,823,161	1,584,793,503	46	120,177	2,888	41.61	664,202
2007	548,853	491,531	89.56	3,451,356,197	1,953,602,106	57	125,749	2,924	43.01	674,602
2008	550,030	495,776	90.14	3,451,356,197	1,797,940,399	52	125,563	2,929	42.87	675,592

References and Related Online Materials

Assessment Roll Hectares within Irrigation Districts:	Alberta Agriculture and Rural Development, Water Resource Branch. (2009). Alberta Irrigation Information: Facts and Figures for the Year 2008. Last updated March 29, 2010. http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/irr7401 (accessed June 22, 2010). Note: Acres converted to hectares using conversion factor 1 acre = 0.404685642 hectares.
Area actually irrigated in the Irrigation Districts:	See reference for: Assessment Roll Hectares within Irrigation Districts
Utilisation rate of Assessment Roll Hectares:	Calculated from first two columns.
Water License Allocation for Irrigation Districts:	Calculation based on: Alberta Agriculture and Rural Development. (no date). Irrigation District Water Licence Allocations. Last updated March 29, 2010. http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/irr12434 (accessed June 22, 2010). Note: Acre-feet converted to cubic metres using conversion factor 1 acre-foot = 1233.48184 cubic metres.
Total Volume of Water Diverted to Irrigation Districts:	See reference for: Assessment Roll Hectares within Irrigation Districts Note: Acre-feet converted to cubic metres using conversion factor 1 acre-foot = 1233.48184 cubic metres.
Utilisation rate of water license allocation:	Calculated from previous two columns.
Total Private Hectares Irrigated:	See reference for: Assessment Roll Hectares within Irrigation Districts
Total Number of Private Irrigation Licences:	See reference for: Assessment Roll Hectares within Irrigation Districts
Average number of Hectares per Licence:	Calculated from previous two columns.
Total Hectares Licenced for Irrigation:	Calculted by adding "Assessment Roll Hectares within Irrigation Districts" and "Total Private Hectares Irrigated."

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