Year	Percent
1950	4.80588
1955	4.6331
1960	4.63116
1965	2.57256
1970	3.81639
1975	3.54697
1980	3.64993
1985	4.02413
1990	4.07037
1995	4.38941
2000	4.42365
2005	4.23922
2010	4.20789
2015	4.73377
2020	6.36579
2025	8.72764
2030	10.82084
2035	12.79039
2040	15.12341
2045	17.0438
2050	18.95366
2055	22.1628
2060	25.91334
2065	29.01726
2070	30.75108
2075	31.92204
2080	32.85444
2085	33.65552
2090	34.35851
2095	35.05073
2100	35.51834