Year	Percent
1950	4.23487
1955	4.46084
1960	4.60166
1965	4.75426
1970	4.73033
1975	4.45757
1980	4.4806
1985	4.93194
1990	6.07099
1995	6.62717
2000	6.98907
2005	7.58725
2010	8.12881
2015	9.5494
2020	11.49477
2025	13.51454
2030	15.0745
2035	16.45796
2040	18.01787
2045	20.12135
2050	22.34263
2055	24.67078
2060	26.41463
2065	28.01038
2070	29.5918
2075	31.55019
2080	33.15362
2085	34.4075
2090	35.38272
2095	36.19455
2100	36.96372