Year	Percent
1950	14.1681
1955	13.57853
1960	12.59845
1965	12.22905
1970	12.0909
1975	11.80354
1980	11.89089
1985	12.25378
1990	12.80828
1995	13.88092
2000	15.18108
2005	16.49994
2010	18.17475
2015	20.42303
2020	22.25801
2025	23.72531
2030	24.93978
2035	25.44162
2040	26.07306
2045	26.5845
2050	26.61144
2055	26.49548
2060	26.16346
2065	25.75733
2070	25.36182
2075	24.74609
2080	24.13497
2085	23.63431
2090	23.27831
2095	23.02863
2100	22.81531