Year	Percent
1950	7.50082
1955	7.67576
1960	8.62454
1965	10.21023
1970	11.87955
1975	12.70711
1980	11.71286
1985	11.95697
1990	14.71574
1995	15.64749
2000	16.48717
2005	17.02699
2010	19.35254
2015	22.56004
2020	25.79082
2025	27.55685
2030	28.88825
2035	30.92691
2040	33.79996
2045	37.13247
2050	39.54527
2055	41.21593
2060	41.6669
2065	41.41184
2070	41.81486
2075	41.9184
2080	41.58993
2085	41.02384
2090	40.48856
2095	40.07506
2100	39.92624