Year	Percent
1950	9.98256
1955	10.04645
1960	10.0748
1965	10.0998
1970	10.3804
1975	10.7753
1980	11.05637
1985	11.07423
1990	10.95153
1995	10.4076
2000	9.82407
2005	9.38806
2010	8.9352
2015	8.76787
2020	8.4054
2025	8.2187
2030	8.08763
2035	7.69904
2040	7.38072
2045	7.11257
2050	6.85563
2055	6.60837
2060	6.38877
2065	6.17617
2070	5.97723
2075	5.80536
2080	5.6641
2085	5.53228
2090	5.4191
2095	5.32008
2100	5.23235