Year	Percent
1950	28.37462
1955	27.96032
1960	29.12295
1965	26.38261
1970	23.74241
1975	24.68716
1980	26.38563
1985	29.77037
1990	31.11345
1995	31.18293
2000	31.81409
2005	32.19949
2010	33.872
2015	34.3771
2020	32.62503
2025	31.02017
2030	29.1763
2035	29.4422
2040	30.70434
2045	31.12576
2050	30.77386
2055	28.93886
2060	27.88647
2065	27.7012
2070	27.86181
2075	27.69818
2080	26.98381
2085	26.03199
2090	25.29236
2095	24.96906
2100	24.88135