Year	Percent
1950	9.9021
1955	10.1114
1960	10.19079
1965	10.00446
1970	9.85883
1975	9.94949
1980	9.93604
1985	9.86838
1990	10.29704
1995	10.73385
2000	10.80555
2005	10.47623
2010	10.18881
2015	10.26042
2020	10.59402
2025	10.7794
2030	10.84176
2035	10.61127
2040	10.39967
2045	10.24419
2050	10.09093
2055	9.89874
2060	9.6473
2065	9.35563
2070	9.05465
2075	8.745
2080	8.47726
2085	8.2277
2090	7.96577
2095	7.70499
2100	7.45346