Year	Percent
1950	7.28192
1955	6.57594
1960	5.94753
1965	5.66545
1970	5.62873
1975	6.15014
1980	6.70495
1985	7.67929
1990	9.35314
1995	9.99605
2000	10.71823
2005	11.41654
2010	13.18774
2015	16.26196
2020	19.30554
2025	22.78757
2030	26.18771
2035	28.57199
2040	30.49821
2045	31.53415
2050	32.14849
2055	32.70535
2060	33.60463
2065	34.98806
2070	36.1601
2075	37.38893
2080	38.413
2085	39.40406
2090	40.4019
2095	41.32176
2100	42.05217