Year	Percent
1950	5.51622
1955	5.5006
1960	5.22155
1965	4.88666
1970	4.80284
1975	4.82517
1980	4.85515
1985	5.37787
1990	5.60542
1995	5.40847
2000	5.25437
2005	5.41565
2010	5.44169
2015	6.06546
2020	6.88098
2025	8.09859
2030	9.24769
2035	9.60556
2040	10.04175
2045	10.79332
2050	11.89488
2055	12.73724
2060	13.74681
2065	13.92102
2070	15.02601
2075	16.17097
2080	17.30466
2085	18.33006
2090	19.1623
2095	19.88724
2100	20.74817