Year	Percent
1950	16.12351
1955	16.09088
1960	16.00277
1965	15.75964
1970	15.39279
1975	14.91768
1980	14.34178
1985	13.59642
1990	12.90488
1995	12.3953
2000	11.99059
2005	11.75654
2010	11.76888
2015	12.07275
2020	12.74592
2025	13.83752
2030	15.03092
2035	16.03193
2040	16.82391
2045	17.64327
2050	18.60328
2055	19.63875
2060	20.5828
2065	21.27435
2070	21.7264
2075	22.09092
2080	22.45912
2085	22.81286
2090	23.12768
2095	23.37395
2100	23.55842