Year	Percent
1950	7.47973
1955	6.84944
1960	6.58254
1965	6.32981
1970	6.18141
1975	6.1359
1980	5.98284
1985	5.82587
1990	6.2504
1995	6.08104
2000	5.88996
2005	5.67655
2010	5.46377
2015	5.48299
2020	5.45099
2025	5.3641
2030	5.34323
2035	5.48412
2040	5.82034
2045	6.33936
2050	7.00931
2055	7.95242
2060	9.36241
2065	11.05356
2070	12.72356
2075	14.27283
2080	15.62813
2085	17.11415
2090	18.74642
2095	20.38936
2100	21.91422