Year	Percent
1950	4.89948
1955	4.70191
1960	4.74391
1965	4.80003
1970	4.89505
1975	5.05124
1980	5.11428
1985	5.30039
1990	6.12687
1995	6.44361
2000	6.9184
2005	7.64769
2010	8.9721
2015	10.83619
2020	13.00604
2025	15.56477
2030	18.24593
2035	20.33317
2040	22.62771
2045	25.10553
2050	27.45154
2055	29.65033
2060	31.4322
2065	33.11058
2070	34.46632
2075	35.49386
2080	36.26649
2085	36.79639
2090	37.17042
2095	37.43973
2100	37.65253