Year	Percent
1950	10.93388
1955	10.83855
1960	10.83739
1965	9.59984
1970	11.09113
1975	10.44735
1980	9.01251
1985	10.85283
1990	8.78391
1995	10.50836
2000	9.41272
2005	9.53355
2010	9.70845
2015	10.224
2020	11.06604
2025	11.20952
2030	11.19477
2035	11.1795
2040	11.2055
2045	11.19306
2050	11.12852
2055	11.02035
2060	10.85522
2065	10.63987
2070	10.39328
2075	10.11747
2080	9.82393
2085	9.50084
2090	9.20723
2095	8.885
2100	8.59027