Year	Percent
1950	8.7078
1955	8.3826
1960	11.40303
1965	9.96986
1970	9.43209
1975	7.84821
1980	8.03008
1985	7.96805
1990	8.01458
1995	7.55345
2000	6.18854
2005	5.07328
2010	4.76658
2015	5.90963
2020	6.14
2025	5.97288
2030	5.63433
2035	5.26513
2040	5.12903
2045	5.34815
2050	5.66136
2055	5.76613
2060	5.63234
2065	5.43328
2070	5.33055
2075	5.38156
2080	5.50843
2085	5.56269
2090	5.48531
2095	5.3324
2100	5.21555