Year	Percent
1950	9.34805
1955	9.23972
1960	9.43651
1965	9.54549
1970	9.24999
1975	8.85911
1980	8.47199
1985	8.95735
1990	9.89952
1995	9.03576
2000	8.83551
2005	8.56795
2010	8.02769
2015	7.9414
2020	7.70174
2025	7.53356
2030	7.22332
2035	6.91542
2040	6.64868
2045	6.4124
2050	6.20287
2055	6.01233
2060	5.83672
2065	5.66506
2070	5.5129
2075	5.39236
2080	5.2867
2085	5.20036
2090	5.11741
2095	5.03655
2100	4.96775