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Table 6 Confidence intervals for the 100-year average carbon stored in HWP for selected years using the California Forest Project Protocol. Means and confidence intervals were calculated using Monte Carlo simulation.

From: Estimates of carbon stored in harvested wood products from the United States forest service northern region, 1906-2010

Inventory year Simulation Mean
(MgC)
90% Confidence interval
   5%
(MgC)
95%
(MgC)
1910 73,654 41,230 117,343
1920 93,830 52,524 149,486
1930 75,929 42,504 120,967
1940 102,538 57,399 163,360
1950 181,181 113,537 270,498
1960 628,840 394,062 938,842
1970 898,820 563,303 1,336,731
1980 503,370 382,408 653,254
1990 613,729 463,510 803,920
1995 207,441 159,195 268,110
2000 143,439 108,755 186,617
2005 140,321 107,692 179,018
2006 91,865 70,445 116,970
2007 87,791 67,609 112,596
2008 84,825 66,493 106,480
2009 91,998 71,596 115,991