Year	Percent
1950	9.85343
1955	9.05684
1960	9.85483
1965	12.396
1970	12.15733
1975	11.87702
1980	11.95493
1985	11.82194
1990	11.75284
1995	11.77886
2000	10.54861
2005	9.51678
2010	9.49805
2015	9.64305
2020	8.57536
2025	7.65664
2030	7.3143
2035	7.12698
2040	6.95868
2045	6.70272
2050	6.39639
2055	6.09056
2060	5.87992
2065	5.77634
2070	5.71645
2075	5.64664
2080	5.55277
2085	5.46287
2090	5.39694
2095	5.36941
2100	5.35848