Year	Percent
1950	7.87715
1955	7.90491
1960	7.74416
1965	8.45802
1970	9.62187
1975	10.27363
1980	9.65211
1985	9.95762
1990	13.2542
1995	13.69343
2000	16.01428
2005	15.64577
2010	16.24055
2015	17.48273
2020	18.76551
2025	20.01665
2030	20.48155
2035	21.52542
2040	23.15831
2045	25.60282
2050	28.00044
2055	28.52605
2060	27.7237
2065	26.69462
2070	27.07054
2075	27.8897
2080	28.74034
2085	29.41675
2090	29.80662
2095	30.02719
2100	30.38174