Year	Percent
1950	5.22913
1955	5.13591
1960	5.05493
1965	5.05739
1970	5.18023
1975	4.96894
1980	4.73578
1985	4.50334
1990	4.78042
1995	5.19133
2000	5.37185
2005	5.65634
2010	5.94688
2015	6.6036
2020	7.13613
2025	7.66537
2030	8.25039
2035	9.06216
2040	10.22721
2045	11.87104
2050	13.63435
2055	15.16001
2060	16.43959
2065	17.56964
2070	18.79534
2075	20.25963
2080	21.66938
2085	22.94138
2090	24.05931
2095	25.06675
2100	26.01289