Year	Percent
1950	10.04256
1955	9.54624
1960	9.87991
1965	10.54219
1970	11.18297
1975	10.98142
1980	11.55485
1985	8.95503
1990	7.01057
1995	6.25965
2000	6.76257
2005	7.0858
2010	7.18606
2015	7.23493
2020	6.7739
2025	6.32099
2030	5.26985
2035	5.3283
2040	5.61393
2045	5.94042
2050	5.95807
2055	5.68943
2060	5.37786
2065	5.24074
2070	5.31919
2075	5.44136
2080	5.45076
2085	5.33023
2090	5.17484
2095	5.0936
2100	5.10739