Year	Percent
1950	5.61239
1955	5.75811
1960	5.98062
1965	5.90186
1970	5.94032
1975	6.16539
1980	5.48368
1985	5.09335
1990	6.05859
1995	6.23976
2000	5.55809
2005	4.712
2010	5.6886
2015	5.93869
2020	6.63707
2025	7.74751
2030	8.98304
2035	10.37115
2040	11.66621
2045	13.26969
2050	15.13352
2055	17.24337
2060	19.4215
2065	21.3752
2070	22.77303
2075	24.08846
2080	25.48552
2085	26.86843
2090	28.11672
2095	29.19309
2100	30.1402