Appendix D "Siskiyou County, Northeast Plateau" Table D-38 Parameter 1980 1985 1990 1995 2000 2005 2010 2015 2020 Population 40000 41500 43629 44999 44479 45606 47109 49196 51283 Avg. Daily VMT/1000 1197 1332 1782 1845 1536 1914 1944 2204 2588