Year	Percent
1950	3.8553
1955	4.36213
1960	4.74273
1965	5.04212
1970	5.37113
1975	5.64446
1980	5.81094
1985	5.96243
1990	6.44538
1995	6.50856
2000	6.59302
2005	6.95616
2010	7.47828
2015	8.8395
2020	9.42307
2025	10.29596
2030	11.52281
2035	13.20707
2040	15.44443
2045	18.12723
2050	21.26663
2055	24.74188
2060	28.48999
2065	31.93805
2070	34.6581
2075	36.25204
2080	37.69479
2085	38.96368
2090	39.90213
2095	40.42407
2100	40.66537