Year	Percent
1950	4.23444
1955	4.24861
1960	4.22669
1965	3.04059
1970	5.61303
1975	5.26815
1980	5.84016
1985	5.98396
1990	6.56961
1995	6.50434
2000	6.32303
2005	5.18383
2010	4.20289
2015	3.75407
2020	3.78396
2025	4.2555
2030	4.95498
2035	5.64403
2040	6.98533
2045	7.53086
2050	8.43797
2055	8.94843
2060	9.61709
2065	10.67185
2070	11.79892
2075	12.86197
2080	13.78133
2085	14.6579
2090	15.55897
2095	16.48571
2100	17.43504