Year	Percent
1950	21.71242
1955	21.41015
1960	20.98441
1965	20.20947
1970	19.35372
1975	18.48861
1980	17.30499
1985	15.92767
1990	14.64587
1995	13.59465
2000	13.14853
2005	13.18467
2010	14.20786
2015	15.93246
2020	18.01189
2025	19.94826
2030	21.17072
2035	21.46533
2040	21.11588
2045	20.56989
2050	20.66423
2055	21.7127
2060	22.96376
2065	23.95249
2070	24.39825
2075	24.31644
2080	24.28142
2085	24.49294
2090	24.80832
2095	25.05955
2100	25.14239