Year	Percent
1950	3.48325
1955	4.17949
1960	4.63648
1965	5.07904
1970	5.34442
1975	5.52015
1980	5.94634
1985	5.93592
1990	6.20704
1995	5.98285
2000	5.95539
2005	5.97893
2010	6.18337
2015	6.68618
2020	7.32675
2025	8.25656
2030	9.42715
2035	10.92703
2040	12.69269
2045	14.87051
2050	17.49736
2055	20.40608
2060	22.91942
2065	25.03517
2070	27.21604
2075	29.22763
2080	31.05925
2085	32.627
2090	33.94845
2095	35.04655
2100	35.93243