Year	Percent
1950	14.69122
1955	15.25937
1960	14.8815
1965	14.29534
1970	14.76263
1975	15.17196
1980	16.65269
1985	18.00623
1990	19.40758
1995	23.41788
2000	27.63058
2005	29.51267
2010	30.90812
2015	31.9935
2020	31.6569
2025	30.4695
2030	28.81114
2035	27.38838
2040	26.11666
2045	25.11004
2050	24.59304
2055	23.62344
2060	22.85287
2065	22.40507
2070	22.23763
2075	22.17289
2080	22.06132
2085	21.87951
2090	21.59807
2095	21.35346
2100	21.18991