Year	Percent
1950	7.84017
1955	7.69749
1960	8.0432
1965	10.55711
1970	9.25692
1975	8.46438
1980	7.9817
1985	7.15209
1990	6.05868
1995	6.40734
2000	6.40888
2005	6.08386
2010	6.24617
2015	5.52419
2020	5.30925
2025	5.55645
2030	5.45072
2035	5.51686
2040	5.49701
2045	5.39621
2050	5.31025
2055	5.30377
2060	5.33747
2065	5.34221
2070	5.30256
2075	5.2425
2080	5.17759
2085	5.1381
2090	5.11807
2095	5.09936
2100	5.06781