Year	Percent
1950	13.51822
1955	13.43829
1960	13.40879
1965	13.46767
1970	13.59861
1975	13.73564
1980	13.8008
1985	13.81165
1990	13.69497
1995	11.78897
2000	12.3905
2005	13.69518
2010	15.56584
2015	17.48694
2020	19.57051
2025	22.26927
2030	25.51435
2035	28.10603
2040	29.43372
2045	29.44045
2050	28.38659
2055	27.27181
2060	26.6568
2065	26.27915
2070	25.61457
2075	24.92074
2080	24.05499
2085	23.3669
2090	22.98925
2095	22.84239
2100	22.75122