Year	Percent
1950	27.10343
1955	26.97211
1960	26.87783
1965	26.46151
1970	26.30901
1975	26.83155
1980	27.7347
1985	29.33277
1990	30.70214
1995	31.41965
2000	31.90983
2005	32.06024
2010	32.33003
2015	32.20912
2020	31.25086
2025	30.28692
2030	29.16689
2035	28.40213
2040	27.90142
2045	27.26743
2050	26.43347
2055	25.37917
2060	24.44273
2065	23.68412
2070	23.06948
2075	22.52429
2080	22.00778
2085	21.51302
2090	21.08236
2095	20.74076
2100	20.48355