Year	Percent
1950	11.92384
1955	11.10241
1960	11.73147
1965	12.25806
1970	12.36479
1975	12.62299
1980	11.82668
1985	11.08296
1990	11.21656
1995	11.2095
2000	10.16033
2005	9.29936
2010	8.8722
2015	7.94095
2020	7.0665
2025	6.72965
2030	6.31659
2035	5.9074
2040	5.55561
2045	5.28261
2050	5.06712
2055	4.90601
2060	4.80257
2065	4.71391
2070	4.64399
2075	4.59951
2080	4.57579
2085	4.57666
2090	4.58877
2095	4.59739
2100	4.60043