Year	Percent
1950	11.38219
1955	11.20204
1960	11.33633
1965	12.36022
1970	12.35614
1975	12.29958
1980	12.25663
1985	12.3918
1990	12.53285
1995	12.3095
2000	11.5845
2005	11.38078
2010	11.6482
2015	11.41838
2020	11.04115
2025	10.49697
2030	10.12071
2035	9.82173
2040	9.53852
2045	9.25575
2050	8.95591
2055	8.66286
2060	8.377
2065	8.1328
2070	7.90334
2075	7.67979
2080	7.46444
2085	7.24224
2090	7.03536
2095	6.83745
2100	6.65137