Year	Percent
1950	4.57044
1955	4.60366
1960	4.72077
1965	4.8506
1970	4.74806
1975	4.61526
1980	4.45775
1985	4.65991
1990	5.68062
1995	6.02657
2000	6.45268
2005	7.07697
2010	7.81133
2015	8.95668
2020	10.22622
2025	11.67754
2030	13.52236
2035	16.15404
2040	18.58629
2045	20.84793
2050	23.21111
2055	25.62508
2060	27.97654
2065	30.05995
2070	31.7826
2075	33.42551
2080	34.8333
2085	35.95516
2090	36.78311
2095	37.38678
2100	37.83868