AIR BASIN	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999																															
GREAT BASIN VALLEYS									27.9	24.1	29.0	17.9	28.9	25.7	23.4	21.0	20.1	20.0	19.6	14.0																															
LAKE COUNTY										12.0		11.0	11.1	9.9	10.1	9.6	9.1	7.7																																	
LAKE TAHOE											26.0	24.6			23.5	19.3		19.6	19.6	17.4																															
MOJAVE DESERT									33.6	38.4	38.6	36.6	35.6	30.5	24.7		25.6	25.2	14.2	27.9																															
MOUNTAIN COUNTIES											28.7	34.1	21.1	15.7	28.7	21.7	18.8	25.0	22.5	22.5																															
NORTH CENTRAL COAST									20.8	22.2	22.3			15.6	27.6	29.5	27.7	31.7	25.9	27.6																															
NORTH COAST									31.0	28.2	24.4	22.5	20.1	20.5	21.1	23.4	21.6	20.7	19.6	21.2																															
NORTHEAST PLATEAU									21.9	21.7			20.9		20.3	12.2	10.7			22.2																															
SACRAMENTO VALLEY									36.7	35.5	36.0	37.7	31.4	28.8	30.0	26.3	25.5	25.3	22.8	30.3																															
SALTON SEA									48.5	61.1	64.9	59.8	43.7	47.2	45.3	59.6	62.4	76.9	58.6	66.3																															
SAN DIEGO									36.8	41.3	33.4	38.0		40.0	45.2	39.8	28.4	41.9	38.6	47.5																															
SAN FRANCISCO BAY AREA									34.6	34.4	33.0	31.5	29.5	25.1	24.8	22.1	22.1	23.7	22.5	25.4																															
SAN JOAQUIN VALLEY									60.0	57.3	68.5	58.1	56.6	45.3	44.3	48.9	47.6	42.3	32.1	50.3																															
SOUTH CENTRAL COAST									36.2	36.2	34.5	34.3	28.5	25.5	26.0	23.3	26.2	28.4	23.8	28.1																															
SOUTH COAST									81.8	81.3	66.9	65.5	62.4	58.0	56.0	51.8	52.0	56.3	43.3	64.9