Year	Percent
1950	10.42178
1955	11.80242
1960	12.45765
1965	12.80278
1970	13.11177
1975	13.18373
1980	12.55992
1985	11.64597
1990	11.48563
1995	11.3959
2000	10.90096
2005	9.10144
2010	7.54213
2015	6.76887
2020	6.94042
2025	7.92589
2030	7.47364
2035	6.74487
2040	6.01256
2045	5.58677
2050	5.57786
2055	5.74394
2060	5.78466
2065	5.60044
2070	5.30911
2075	5.11015
2080	5.07886
2085	5.14271
2090	5.17947
2095	5.12154
2100	4.99225