Year	Percent
1950	19.81218
1955	19.21913
1960	17.84701
1965	16.63575
1970	15.83249
1975	15.25807
1980	14.35297
1985	13.0771
1990	12.37507
1995	13.30025
2000	16.01121
2005	19.47835
2010	22.59806
2015	24.31926
2020	25.22184
2025	26.17801
2030	27.48607
2035	28.48283
2040	27.51728
2045	25.76582
2050	24.15954
2055	23.09918
2060	23.61579
2065	24.4343
2070	24.3612
2075	23.53887
2080	22.77008
2085	22.26472
2090	22.32914
2095	22.68593
2100	22.83694