Year	Percent
1950	4.55824
1955	4.59753
1960	4.72179
1965	4.85722
1970	4.98863
1975	5.12701
1980	5.14558
1985	5.04203
1990	4.94998
1995	4.51871
2000	4.15279
2005	4.06956
2010	4.08706
2015	4.03209
2020	4.04143
2025	4.20526
2030	4.52757
2035	5.0644
2040	5.74624
2045	6.54225
2050	7.32771
2055	8.15379
2060	9.1613
2065	10.38795
2070	11.77118
2075	13.06976
2080	14.3034
2085	15.46715
2090	16.55647
2095	17.56601
2100	18.50003