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1917?8,500*
1920?2,000
1930?31,755
1940?104,619
1950?183,815
1960?401,800
1970?466,600
1980?394,425
1990?460,917
2000?374,911
2001?376,695
* First available
Lassen visitation
1917?8,500*
1920?2,000
1930?31,755
1940?104,619
1950?183,815
1960?401,800
1970?466,600
1980?394,425
1990?460,917
2000?374,911
2001?376,695
* First available
