Year	Percent
1950	10.22082
1955	9.90414
1960	9.25019
1965	9.26623
1970	10.46075
1975	10.43525
1980	10.36161
1985	10.14536
1990	10.09508
1995	10.08801
2000	10.32356
2005	10.11754
2010	9.69751
2015	9.42155
2020	9.10704
2025	8.65223
2030	7.86963
2035	7.6129
2040	7.3493
2045	7.08171
2050	6.74873
2055	6.4039
2060	6.14715
2065	5.98283
2070	5.85091
2075	5.71704
2080	5.5892
2085	5.47521
2090	5.38721
2095	5.32587
2100	5.27877