Year	Percent
1950	14.11165
1955	13.13305
1960	11.96281
1965	11.91119
1970	12.21004
1975	12.18009
1980	11.44448
1985	10.36418
1990	10.21469
1995	11.70615
2000	12.03292
2005	12.84497
2010	12.69306
2015	13.05565
2020	14.09375
2025	16.22488
2030	18.58433
2035	19.5224
2040	20.37343
2045	20.7676
2050	21.71528
2055	23.24432
2060	24.26653
2065	24.7487
2070	24.83852
2075	25.0148
2080	25.35438
2085	25.71846
2090	25.84698
2095	25.65775
2100	25.27371