Year	Percent
1950	8.05099
1955	10.17119
1960	10.7766
1965	11.85219
1970	11.7558
1975	12.32988
1980	13.25244
1985	12.77599
1990	13.06444
1995	13.38924
2000	13.37116
2005	11.72781
2010	11.96543
2015	12.36064
2020	12.79155
2025	11.50664
2030	10.49333
2035	9.91044
2040	9.57295
2045	9.2759
2050	8.88419
2055	8.40419
2060	7.88415
2065	7.42063
2070	7.04303
2075	6.7151
2080	6.41561
2085	6.11592
2090	5.83396
2095	5.58797
2100	5.38686