2003 Almanac (page 506) Table D-45 Sacramento Valley Air Basin - Shasta County: Population and VMT Trends Sacramento Valley Air Basin: Shasta County Surface Area = 3793 square miles Parameter 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Population 121800 123200 125800 129100 131200 134200 138200 141800 148000 153800 156500 158100 159000 159700 160000 161200 161900 162200 165200 168600 Avg. Daily VMT/1000 2210 2377 2547 2728 2942 3104 3350 3572 3802 3855 3954 4027 4010 4009 4002 3937 3902 3985 4068 4164