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.

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