Year	Percent
1950	4.52347
1955	4.74381
1960	4.89487
1965	4.98247
1970	5.01441
1975	5.0327
1980	4.86208
1985	4.64291
1990	4.66373
1995	4.35133
2000	4.27637
2005	4.25551
2010	4.28428
2015	4.32802
2020	4.3757
2025	4.39471
2030	4.46822
2035	4.57104
2040	4.68197
2045	4.88725
2050	5.25095
2055	5.74609
2060	6.42099
2065	7.10962
2070	7.87806
2075	8.69935
2080	9.64008
2085	10.64429
2090	11.69923
2095	12.78805
2100	13.89715