Year	Percent
1950	10.95128
1955	11.41065
1960	12.80322
1965	14.33228
1970	15.65625
1975	16.93537
1980	14.94869
1985	16.0503
1990	19.03991
1995	19.65256
2000	20.21364
2005	21.37371
2010	22.10145
2015	25.02067
2020	26.76854
2025	27.19163
2030	28.27694
2035	30.4533
2040	33.02352
2045	33.95153
2050	34.7349
2055	35.98114
2060	36.06707
2065	35.92003
2070	35.93923
2075	35.7782
2080	35.78014
2085	35.90454
2090	36.09924
2095	36.27257
2100	36.46723