Year	Percent
1950	10.79082
1955	10.76643
1960	9.76035
1965	8.80559
1970	9.49615
1975	10.59419
1980	10.92525
1985	11.0756
1990	10.9815
1995	10.77794
2000	10.51902
2005	9.76633
2010	9.14193
2015	8.71993
2020	8.63388
2025	8.22436
2030	8.20196
2035	7.70584
2040	7.31221
2045	7.03203
2050	6.85323
2055	6.7051
2060	6.53547
2065	6.35476
2070	6.1782
2075	6.03638
2080	5.93122
2085	5.8568
2090	5.77597
2095	5.69591
2100	5.6183