Year	Percent
1950	5.06177
1955	4.94538
1960	4.98248
1965	5.05027
1970	5.13179
1975	5.18545
1980	5.18538
1985	5.06563
1990	4.94002
1995	4.52389
2000	4.18584
2005	4.13131
2010	4.14703
2015	4.13989
2020	4.1772
2025	4.34974
2030	4.68076
2035	5.22545
2040	5.91341
2045	6.72516
2050	7.55156
2055	8.45166
2060	9.54102
2065	10.82884
2070	12.27255
2075	13.62241
2080	14.90944
2085	16.14196
2090	17.32466
2095	18.44636
2100	19.50254