Year	Percent
1950	3.19589
1955	3.36076
1960	3.70165
1965	3.64755
1970	3.85093
1975	4.45247
1980	4.60169
1985	4.81707
1990	5.59234
1995	6.23296
2000	7.05022
2005	8.21755
2010	9.64509
2015	11.50458
2020	13.71016
2025	16.59498
2030	19.60621
2035	22.15069
2040	24.33992
2045	26.41725
2050	28.28835
2055	30.0032
2060	31.63966
2065	33.06889
2070	34.09008
2075	35.36749
2080	36.45697
2085	37.29833
2090	38.03105
2095	38.6658
2100	39.22181