Year	Percent
1950	10.22449
1955	10.02751
1960	10.07477
1965	8.97747
1970	10.66549
1975	10.77425
1980	11.01483
1985	10.95218
1990	11.25266
1995	12.09153
2000	12.97728
2005	12.78763
2010	12.02
2015	10.99688
2020	10.67755
2025	11.15322
2030	11.51949
2035	10.62862
2040	9.86005
2045	9.37057
2050	9.10108
2055	8.84201
2060	8.51711
2065	8.13407
2070	7.72161
2075	7.37083
2080	7.07861
2085	6.8437
2090	6.62785
2095	6.4096
2100	6.21964