Year	Percent
1950	11.24184
1955	11.28802
1960	10.93459
1965	10.54458
1970	10.37061
1975	10.91661
1980	12.11077
1985	11.14086
1990	10.8084
1995	10.43306
2000	9.73528
2005	9.55089
2010	9.19755
2015	8.90421
2020	8.46207
2025	8.0315
2030	7.65402
2035	7.31264
2040	7.00484
2045	6.72156
2050	6.45745
2055	6.20239
2060	5.97578
2065	5.79243
2070	5.63594
2075	5.5091
2080	5.39265
2085	5.28295
2090	5.19122
2095	5.1102
2100	5.04494