Year	Percent
1950	9.31172
1955	9.92439
1960	10.1975
1965	10.53751
1970	10.79706
1975	10.88504
1980	11.26907
1985	11.62338
1990	14.6442
1995	15.06414
2000	15.04341
2005	15.8313
2010	16.8546
2015	19.11713
2020	21.54719
2025	23.76993
2030	25.43963
2035	26.87598
2040	28.11799
2045	29.47905
2050	30.56418
2055	32.13666
2060	32.91823
2065	33.60123
2070	34.71878
2075	35.6386
2080	36.38907
2085	37.0347
2090	37.56708
2095	38.04609
2100	38.54197