Year	Percent
1950	10.18454
1955	8.86159
1960	8.26964
1965	9.19444
1970	10.50235
1975	11.41693
1980	13.19956
1985	11.08981
1990	10.27424
1995	8.5677
2000	9.25081
2005	9.01085
2010	9.22199
2015	8.70012
2020	8.15841
2025	7.82122
2030	7.65498
2035	7.35487
2040	7.08004
2045	6.81329
2050	6.52852
2055	6.28169
2060	6.08771
2065	5.92193
2070	5.77858
2075	5.63771
2080	5.51142
2085	5.40708
2090	5.31753
2095	5.25617
2100	5.20148