Year	Percent
1950	11.61294
1955	10.42307
1960	11.64639
1965	12.3357
1970	13.36527
1975	13.66502
1980	12.16652
1985	10.27974
1990	10.55811
1995	11.6142
2000	11.88107
2005	11.08549
2010	11.43389
2015	9.11085
2020	10.82792
2025	10.59777
2030	10.35188
2035	9.91272
2040	9.28003
2045	8.77412
2050	8.68343
2055	8.77254
2060	8.63574
2065	8.28145
2070	7.84385
2075	7.47992
2080	7.28909
2085	7.21365
2090	7.10987
2095	6.88025
2100	6.57394