Year	Percent
1950	9.90036
1955	9.48386
1960	8.90297
1965	6.13541
1970	5.52946
1975	5.71181
1980	6.89443
1985	7.43351
1990	9.63896
1995	10.77734
2000	13.16569
2005	16.61611
2010	20.4326
2015	23.99573
2020	27.37035
2025	30.11919
2030	32.18214
2035	33.12914
2040	33.25926
2045	32.81088
2050	31.9237
2055	32.6331
2060	33.53604
2065	34.72735
2070	36.80474
2075	38.86683
2080	40.56845
2085	41.96429
2090	43.25134
2095	44.42375
2100	45.41852