Year	Percent
1950	10.99164
1955	9.74608
1960	10.26663
1965	11.23778
1970	12.27884
1975	12.61482
1980	11.70432
1985	13.00458
1990	17.11026
1995	18.97146
2000	20.82098
2005	21.18451
2010	23.19957
2015	26.13704
2020	27.69238
2025	28.71705
2030	29.69892
2035	31.01458
2040	32.41216
2045	33.47567
2050	34.79838
2055	35.76934
2060	36.35243
2065	36.86834
2070	36.98363
2075	37.05294
2080	37.21173
2085	37.4247
2090	37.63836
2095	37.84386
2100	38.06118