Year	Percent
1950	9.25073
1955	8.92896
1960	8.30293
1965	10.21144
1970	9.44769
1975	9.20732
1980	8.82864
1985	8.21701
1990	7.48277
1995	7.50341
2000	8.15384
2005	7.88998
2010	7.83583
2015	6.71637
2020	6.1208
2025	5.93582
2030	5.73996
2035	5.36907
2040	4.95481
2045	4.77103
2050	4.72738
2055	4.74213
2060	4.72926
2065	4.66387
2070	4.59539
2075	4.56473
2080	4.59986
2085	4.66098
2090	4.7045
2095	4.71596
2100	4.70227