Appendix D "Colusa County, Sacramento Valley" Table D-41 Parameter 1980 1985 1990 1995 2000 2005 2010 2015 2020 Population 12900 14600 16300 17850 18928 20935 22697 24517 26337 Avg. Daily VMT/1000 362 441 531 547 550 636 751 855 959