Year	Percent
1950	4.11679
1955	4.08795
1960	4.1049
1965	4.14708
1970	4.18479
1975	4.20055
1980	4.18345
1985	4.18761
1990	4.45447
1995	4.33936
2000	4.30225
2005	4.25406
2010	4.22045
2015	4.25347
2020	4.26173
2025	4.23039
2030	4.1911
2035	4.3658
2040	4.73102
2045	5.25323
2050	5.86536
2055	6.62712
2060	7.54714
2065	8.61884
2070	9.76863
2075	10.94958
2080	12.11788
2085	13.34222
2090	14.63509
2095	15.9673
2100	17.30641