Year	Percent
1950	8.69436
1955	7.58132
1960	7.6396
1965	8.32104
1970	9.78899
1975	9.07081
1980	7.83654
1985	6.97164
1990	7.84816
1995	8.49611
2000	7.93301
2005	7.28967
2010	6.34149
2015	5.05403
2020	4.58116
2025	4.94051
2030	5.03364
2035	5.02003
2040	4.88619
2045	4.61619
2050	4.39562
2055	4.42468
2060	4.62883
2065	4.80469
2070	4.86498
2075	4.82212
2080	4.74226
2085	4.72107
2090	4.7901
2095	4.88244
2100	4.92597