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Figure 13.26A--Subregional Timber Supply Model projections of softwood age structure (volume by age class) on private timberland, Southwide, 1995, 2020, and 2040, under the IH (base case) scenario of inelastic timber demand and high plantation growth rate increase.

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volumes (bcf) by age class, 1995, 2020, and 2040, IH scenario:

Age Classes	Volume in 1995	Volume in 2020	Volume in 2040
0-10	2.75	17.76	26.09
10-20	10.45	11.51	12.37
20-30	14.26	13.56	13.64
30-40	17.26	31.54	42.93
40-50	13.59	4.44	2.52
50+	31.68	29.11	23.75

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