Year	Percent
1950	4.89213
1955	4.67661
1960	4.86905
1965	5.0174
1970	5.1894
1975	5.30863
1980	5.40337
1985	5.47696
1990	5.95858
1995	6.16097
2000	6.44968
2005	6.75612
2010	7.26705
2015	8.3654
2020	9.48402
2025	10.60046
2030	11.69708
2035	12.90764
2040	14.27046
2045	15.94663
2050	17.71603
2055	19.47881
2060	21.24254
2065	22.98017
2070	24.54554
2075	25.6773
2080	26.78422
2085	27.84784
2090	28.88192
2095	29.80717
2100	30.59924