Year	Percent
1950	10.60362
1955	8.94104
1960	8.85747
1965	9.03429
1970	10.67483
1975	10.51272
1980	10.2747
1985	10.07329
1990	10.30367
1995	10.23966
2000	9.86092
2005	9.07038
2010	8.40587
2015	8.24103
2020	7.83337
2025	7.35137
2030	7.03976
2035	6.65457
2040	6.23749
2045	5.88196
2050	5.64582
2055	5.45077
2060	5.30488
2065	5.16122
2070	5.01889
2075	4.89595
2080	4.81606
2085	4.76032
2090	4.73268
2095	4.69682
2100	4.65975