Year	Percent
1950	4.56258
1955	4.62125
1960	4.54441
1965	4.40535
1970	4.23356
1975	4.08356
1980	4.11472
1985	3.93897
1990	4.24929
1995	4.24766
2000	4.17768
2005	4.08199
2010	3.731
2015	3.61845
2020	3.55635
2025	3.62954
2030	3.90906
2035	4.58782
2040	5.74321
2045	7.24671
2050	8.77928
2055	10.2631
2060	11.62086
2065	13.0068
2070	14.73509
2075	16.79087
2080	18.57796
2085	20.13186
2090	21.57177
2095	22.99845
2100	24.40475