Year	Percent
1950	12.71663
1955	14.76318
1960	15.3835
1965	16.33723
1970	15.22546
1975	14.82286
1980	15.20306
1985	16.09488
1990	16.5201
1995	15.47491
2000	13.44032
2005	13.81767
2010	13.77703
2015	13.85395
2020	13.07772
2025	12.0998
2030	11.17398
2035	10.56213
2040	10.15588
2045	9.70283
2050	9.09422
2055	8.42013
2060	7.82349
2065	7.36237
2070	6.98335
2075	6.64801
2080	6.30266
2085	5.98171
2090	5.71411
2095	5.51661
2100	5.36979