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Table 5 Confidence intervals for cumulative carbon in HWP for selected years for harvests beginning in 1906. 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 258,847 151,997 383,534
1920 1,490,397 859,969 2,254,610
1930 2,380,130 1,348,945 3,726,131
1940 2,623,487 1,559,630 4,011,111
1950 4,508,105 2,756,788 6,754,915
1960 9,289,140 5,897,037 13,271,680
1970 17,825,210 11,508,690 25,465,070
1980 23,305,620 14,966,770 33,457,600
1990 27,036,780 19,354,590 35,924,610
1995 28,272,940 20,723,740 37,108,160
2000 27,510,220 20,779,040 35,696,240
2005 26,645,420 19,809,180 34,370,610
2006 26,538,740 19,630,590 34,125,580
2007 26,341,320 19,707,340 33,850,080
2008 26,128,290 19,561,330 33,672,940
2009 25,924,090 19,690,110 33,639,540
2010 25,753,020 19,546,530 33,052,480