Year	Percent
1950	3.31898
1955	4.43214
1960	5.31522
1965	4.69942
1970	4.10746
1975	4.32846
1980	4.83327
1985	5.53248
1990	7.60851
1995	8.73604
2000	9.2618
2005	9.24955
2010	9.00906
2015	9.40529
2020	10.47864
2025	11.23607
2030	12.2312
2035	13.54967
2040	14.43004
2045	15.02324
2050	14.98403
2055	16.01342
2060	17.28686
2065	18.94059
2070	20.78
2075	22.19918
2080	23.18581
2085	24.22784
2090	25.52617
2095	27.03039
2100	28.53326