Year	Percent
1950	12.55982
1955	12.33263
1960	12.66021
1965	13.39942
1970	13.11978
1975	13.05272
1980	12.74428
1985	11.58855
1990	11.74475
1995	12.23722
2000	12.10306
2005	11.60773
2010	11.1091
2015	9.85343
2020	9.35097
2025	8.81855
2030	8.57047
2035	8.17388
2040	7.68774
2045	7.21771
2050	6.84232
2055	6.53393
2060	6.28198
2065	6.04915
2070	5.82639
2075	5.64716
2080	5.50471
2085	5.37829
2090	5.25577
2095	5.15375
2100	5.0774