Year	Percent
1950	10.01812
1955	10.34393
1960	10.52072
1965	9.64392
1970	8.87574
1975	9.71243
1980	10.22942
1985	10.25945
1990	9.99495
1995	10.18298
2000	10.71024
2005	11.41367
2010	10.93577
2015	10.22004
2020	9.29528
2025	9.59056
2030	9.8293
2035	9.44316
2040	8.85078
2045	8.30176
2050	7.99551
2055	7.87109
2060	7.71258
2065	7.42846
2070	7.07657
2075	6.77793
2080	6.57628
2085	6.43016
2090	6.2946
2095	6.13067
2100	5.95861