Year	Percent
1950	6.97484
1955	6.52592
1960	6.43592
1965	6.25721
1970	6.10871
1975	5.90239
1980	5.61301
1985	5.36685
1990	5.4687
1995	5.13317
2000	4.80103
2005	4.49211
2010	4.24604
2015	4.28769
2020	4.30225
2025	4.28547
2030	4.29717
2035	4.4578
2040	4.77001
2045	5.23338
2050	5.8531
2055	6.63483
2060	7.55542
2065	8.58763
2070	9.6998
2075	10.88922
2080	12.13423
2085	13.41846
2090	14.74066
2095	16.06868
2100	17.41647