Year	Percent
1950	12.47428
1955	11.92371
1960	11.41749
1965	11.37969
1970	11.38793
1975	11.38406
1980	11.29999
1985	10.9609
1990	10.47544
1995	11.18422
2000	12.43075
2005	13.68027
2010	15.27148
2015	16.66847
2020	18.39999
2025	20.97056
2030	23.57023
2035	25.5972
2040	26.84975
2045	27.18256
2050	27.24739
2055	27.07444
2060	26.74608
2065	26.29119
2070	25.55609
2075	24.82268
2080	24.18226
2085	23.71447
2090	23.36145
2095	23.08931
2100	22.83406