Year	Percent
1950	13.10082
1955	12.35229
1960	12.29865
1965	12.34848
1970	12.49683
1975	12.62055
1980	12.51466
1985	11.97848
1990	11.31357
1995	11.55349
2000	11.96163
2005	13.22277
2010	14.82995
2015	16.46779
2020	18.06125
2025	19.69585
2030	20.72886
2035	21.32565
2040	21.87397
2045	22.22416
2050	22.95835
2055	23.94178
2060	24.61305
2065	25.04365
2070	25.09281
2075	24.90443
2080	24.89657
2085	24.94511
2090	24.93485
2095	24.74088
2100	24.37722