Year	Percent
1950	10.42694
1955	11.77771
1960	12.53318
1965	13.30393
1970	13.28209
1975	10.06406
1980	10.46694
1985	8.43883
1990	8.04996
1995	7.68194
2000	7.53649
2005	6.9162
2010	6.81513
2015	6.53655
2020	6.34667
2025	6.15325
2030	6.00221
2035	5.88964
2040	5.82165
2045	5.79178
2050	5.77432
2055	5.74366
2060	5.70384
2065	5.64769
2070	5.59945
2075	5.55117
2080	5.50847
2085	5.45765
2090	5.40173
2095	5.34821
2100	5.29777