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Colorado
Within Grazing Districts (Section 3)
Year	Operators or Permits/Leases	Permitted AUMs	Authorized AUMs
1947			963,110
1948			967,661
1949	2,015		985,714
1950	2,045		973,994
1951	2,013		969,108
1952	1,982		943,016
1953	1,932		920,015
1954	1,906		928,387
1955	1,846		906,360
1956	1,777		870,657
1957	1,751		846,337
1958	1,675		798,922
1959	1,689		781,713
1960	1,660		694,911
1961	1,718		693,014
1962	1,851	743,956	679,822
1963	1,789	748,483	684,411
1964	1,776	767,537	668,455
1965	1,699	717,823	639,982
1966	1,638	717,667	655,594
1967	1,676	706,707	643,797
1968	1,555	757,277	670,487
1969	1,633	705,230	637,055
1970	1,612	714,713	623,809
1971	1,580	730,355	630,164
1972	1,538	705,063	594,383
1973	1,555	698,578	586,227
1974	1,513	699,637	579,430
1975	1,567	705,290	565,260
1976	1,578	699,263	574,779
1977	1,781	789,823	467,259
1978	1,437	629,530	441,288
1979	1,309	638,497	435,391
1980	1,358	636,249	433,071
1981	1,321	629,913	447,736
1982	1,323	593,297	456,732
1983	1,409	610,381	490,926
1984	1,269	602,772	460,287
1985	1,305	631,835	446,460
1986	1,295	631,835	440,722
1987	1,284	660,897	450,771
1988	1,312	641,082	472,192
1989	1,282	671,457	389,697
1990	1,213	748,133	406,091
1991	1,268	643,948	374,682
1992	1,244	642,634	392,386
1993	1,229	643,388	400,239
1994	1,211	635,374	420,088
1995	1,200	640,497	398,919
1996	1,191	634,204	384,027
1997	1,191	666,629	418,370
1998	1,180	663,455	409,365
1999	1,194	647,244	412,197
2000	1,178	643,192	409,915
Estimated
Outside Grazing Districts (Section 15)
1979	506		59,640
1980	499		59,301
1981	497		55,185
1982	493		50,353
1983	493		48,152
1984	494		49,924
1985	490		47,440
1986	491		48,194
1987	489		47,540
1988	494		48,574
1989	497		44,411
1990	503		45,304
1991	506		42,972
1992	500		44,162
1993	488	49,167	44,108
1994	485	48,485	41,490
1995	479	47,065	42,565
1996	482	47,365	37,357
1997	478	46,330	42,184
1998	467	45,951	42,302
1999	464	45,875	43,204
2000	454	46,475	35,794
Total
1979	1,815		495,031
1980	1,857		492,372
1981	1,818		502,921
1982	1,816		507,085
1983	1,902		539,078
1984	1,763		510,211
1985	1,795		493,900
1986	1,786		488,916
1987	1,773		498,311
1988	1,806		520,766
1989	1,779		434,108
1990	1,716		451,395
1991	1,774		417,654
1992	1,744		436,548
1993	1,717	692,555	444,347
1994	1,696	683,859	461,578
1995	1,679	687,562	441,484
1996	1,673	681,569	421,384
1997	1,669	712,959	460,554
1998	1,647	709,406	451,667
1999	1,658	693,119	455,401
2000	1,632	689,667	445,709