Year	Percent
1950	14.78018
1955	14.23337
1960	13.67978
1965	11.10415
1970	11.44371
1975	11.86618
1980	8.69546
1985	8.70083
1990	10.83516
1995	11.2778
2000	11.58856
2005	13.87806
2010	15.83587
2015	21.03239
2020	25.55048
2025	29.72983
2030	31.46574
2035	30.53345
2040	28.96823
2045	27.18327
2050	26.92972
2055	27.7014
2060	27.6344
2065	27.10854
2070	26.10096
2075	25.24522
2080	25.00069
2085	24.8406
2090	24.5422
2095	24.13319
2100	23.73406