Year	Percent
1950	14.34485
1955	15.60972
1960	15.11837
1965	14.96523
1970	14.83186
1975	14.04315
1980	13.63849
1985	14.16831
1990	15.14761
1995	17.12075
2000	19.77725
2005	22.70233
2010	25.09936
2015	26.04186
2020	25.74262
2025	25.78148
2030	26.3541
2035	27.23082
2040	27.97587
2045	26.85008
2050	26.10157
2055	25.18716
2060	24.87882
2065	25.44341
2070	25.40588
2075	24.97966
2080	24.42382
2085	23.96587
2090	23.74143
2095	23.71019
2100	23.72233