Year	Percent
1950	10.75684
1955	11.80509
1960	14.73901
1965	14.76678
1970	14.55516
1975	14.19942
1980	13.84541
1985	14.75196
1990	15.87883
1995	15.06209
2000	11.63029
2005	7.93455
2010	7.40996
2015	8.13136
2020	8.32647
2025	7.32835
2030	6.00508
2035	5.05858
2040	4.8063
2045	5.00963
2050	5.19733
2055	5.04701
2060	4.66318
2065	4.33198
2070	4.25696
2075	4.4219
2080	4.64163
2085	4.71623
2090	4.61796
2095	4.46387
2100	4.40727