Year	Percent
1950	3.84925
1955	3.85298
1960	3.80365
1965	3.79251
1970	3.79071
1975	3.76795
1980	3.78778
1985	3.80325
1990	3.86976
1995	4.04113
2000	4.34145
2005	3.96536
2010	3.97834
2015	3.95193
2020	3.92071
2025	3.90995
2030	4.02037
2035	4.25221
2040	4.86465
2045	6.29876
2050	8.47056
2055	10.62552
2060	12.31558
2065	13.69009
2070	15.18983
2075	16.83795
2080	18.57377
2085	20.18069
2090	21.61456
2095	22.93522
2100	24.20734