Year	Percent
1950	8.70116
1955	8.74343
1960	9.4587
1965	10.87795
1970	12.59156
1975	13.86165
1980	13.18024
1985	14.5038
1990	17.61022
1995	19.34648
2000	19.73635
2005	20.22553
2010	21.94157
2015	23.37277
2020	24.39556
2025	25.29907
2030	26.32872
2035	28.18607
2040	30.2346
2045	31.5873
2050	33.12226
2055	33.33598
2060	32.09102
2065	31.24964
2070	31.48363
2075	31.76731
2080	32.26283
2085	32.82095
2090	33.2099
2095	33.42412
2100	33.72974