Year	Percent
1950	6.84129
1955	6.73646
1960	7.5735
1965	9.08864
1970	8.76895
1975	9.08884
1980	9.11221
1985	8.50442
1990	8.39252
1995	7.27444
2000	7.05634
2005	7.10664
2010	6.98833
2015	6.39841
2020	6.13314
2025	6.47599
2030	6.5007
2035	6.58538
2040	6.34754
2045	6.10084
2050	5.92424
2055	5.89346
2060	5.93308
2065	5.94467
2070	5.86939
2075	5.74605
2080	5.62754
2085	5.54749
2090	5.50967
2095	5.47459
2100	5.42039