Year	Percent
1950	11.98021
1955	12.70261
1960	13.20178
1965	11.76798
1970	11.99314
1975	12.28288
1980	12.52299
1985	12.67089
1990	12.53839
1995	12.25195
2000	13.17971
2005	13.30005
2010	13.14995
2015	12.98156
2020	13.14545
2025	12.21212
2030	11.94645
2035	11.60308
2040	11.18747
2045	10.69836
2050	10.23039
2055	9.795
2060	9.37801
2065	8.9986
2070	8.63319
2075	8.28501
2080	7.94684
2085	7.62193
2090	7.31838
2095	7.03385
2100	6.75861