Year	Percent
1950	10.00699
1955	9.69205
1960	9.43795
1965	9.24135
1970	10.50592
1975	11.02666
1980	10.68547
1985	9.76004
1990	9.06206
1995	10.06844
2000	11.46606
2005	12.30304
2010	11.66073
2015	10.2323
2020	9.87908
2025	10.54122
2030	10.90558
2035	10.95609
2040	10.52987
2045	10.01967
2050	9.8091
2055	9.81141
2060	9.74741
2065	9.49234
2070	9.1228
2075	8.78155
2080	8.55132
2085	8.3925
2090	8.19921
2095	7.94549
2100	7.64687