Year	Percent
1950	13.77031
1955	13.48467
1960	13.31844
1965	13.21632
1970	13.17752
1975	13.27448
1980	15.07544
1985	13.82353
1990	12.5525
1995	12.50761
2000	12.0383
2005	13.71195
2010	15.69822
2015	16.66742
2020	16.07663
2025	20.01455
2030	21.01067
2035	23.58042
2040	26.20745
2045	24.04453
2050	24.73352
2055	24.4702
2060	24.94584
2065	25.77822
2070	25.77837
2075	25.51057
2080	25.25943
2085	25.19783
2090	25.16266
2095	24.94335
2100	24.5425