Year	Percent
1950	9.1024
1955	7.76542
1960	7.25333
1965	6.91062
1970	6.68211
1975	6.64635
1980	5.95234
1985	5.85875
1990	7.93424
1995	8.61446
2000	9.27688
2005	8.52096
2010	8.11486
2015	9.27386
2020	11.68786
2025	14.81914
2030	17.03631
2035	18.52224
2040	19.83008
2045	21.9853
2050	24.74199
2055	26.87508
2060	27.5014
2065	27.35153
2070	27.63186
2075	29.33635
2080	30.59392
2085	31.18198
2090	31.49536
2095	31.98131
2100	32.64029