Year	Percent
1950	14.11625
1955	14.32061
1960	13.8991
1965	13.53296
1970	13.59591
1975	13.94775
1980	14.4622
1985	15.10037
1990	16.21936
1995	17.26787
2000	19.19044
2005	21.55136
2010	23.01249
2015	23.80764
2020	24.46717
2025	25.26361
2030	26.45433
2035	27.85528
2040	28.34949
2045	27.6246
2050	26.64316
2055	25.62848
2060	24.81333
2065	24.42225
2070	23.90136
2075	23.43873
2080	23.02831
2085	22.7712
2090	22.61835
2095	22.51676
2100	22.41127