Year	Percent
1950	3.09152
1955	3.96475
1960	5.31281
1965	5.13493
1970	5.05958
1975	4.61216
1980	4.33118
1985	4.16284
1990	4.2804
1995	4.3939
2000	4.43931
2005	4.8465
2010	5.0899
2015	5.23131
2020	5.65336
2025	6.31105
2030	7.14068
2035	8.46569
2040	9.78496
2045	10.76563
2050	11.53027
2055	12.54822
2060	13.92313
2065	15.50924
2070	17.31358
2075	19.03719
2080	20.53867
2085	21.93791
2090	23.34438
2095	24.78374
2100	26.21607