Year	Percent
1950	6.97858
1955	6.38832
1960	6.14058
1965	5.90116
1970	5.75685
1975	5.7131
1980	5.59647
1985	5.45137
1990	5.77258
1995	5.61129
2000	5.42418
2005	5.21421
2010	4.99897
2015	4.95782
2020	4.92214
2025	4.87723
2030	4.91695
2035	5.10844
2040	5.4545
2045	5.94389
2050	6.57205
2055	7.45235
2060	8.75343
2065	10.28802
2070	11.77734
2075	13.14577
2080	14.33263
2085	15.65906
2090	17.14924
2095	18.66783
2100	20.09227