Year	Percent
1950	11.70543
1955	13.65006
1960	15.35882
1965	15.69003
1970	15.90926
1975	15.96749
1980	16.26873
1985	16.30384
1990	16.2313
1995	15.58706
2000	14.17263
2005	14.42543
2010	14.1872
2015	13.83639
2020	12.73747
2025	12.05533
2030	11.46924
2035	10.96897
2040	10.46155
2045	9.91531
2050	9.36997
2055	8.88855
2060	8.44566
2065	8.03605
2070	7.65153
2075	7.285
2080	6.9258
2085	6.60674
2090	6.33834
2095	6.0977
2100	5.88784