Year	Percent
1950	10.71103
1955	11.44108
1960	12.27335
1965	13.11363
1970	13.90977
1975	14.51513
1980	14.93986
1985	15.7094
1990	19.78036
1995	20.20646
2000	20.47141
2005	21.1838
2010	23.6283
2015	25.62016
2020	27.8588
2025	30.36013
2030	32.68284
2035	34.03668
2040	34.35928
2045	34.58299
2050	35.02746
2055	35.44715
2060	35.65473
2065	36.0478
2070	36.26815
2075	36.43115
2080	36.74472
2085	37.14446
2090	37.55215
2095	37.93664
2100	38.26569