Year	Percent
1950	9.80487
1955	9.48228
1960	9.44992
1965	9.32842
1970	10.46035
1975	10.41701
1980	10.40674
1985	10.35907
1990	10.66555
1995	10.71827
2000	10.83974
2005	10.5794
2010	9.90551
2015	9.29161
2020	8.80692
2025	8.66366
2030	8.7202
2035	8.39233
2040	7.9894
2045	7.60342
2050	7.30517
2055	7.09254
2060	6.90004
2065	6.68195
2070	6.4577
2075	6.2491
2080	6.09037
2085	5.97012
2090	5.86329
2095	5.76797
2100	5.67038