Year	Percent
1950	11.35332
1955	11.35941
1960	10.93147
1965	10.48262
1970	10.24888
1975	10.7288
1980	11.80046
1985	10.7855
1990	10.43272
1995	10.05266
2000	9.36901
2005	9.18337
2010	8.84304
2015	8.56364
2020	8.13802
2025	7.72504
2030	7.36372
2035	7.03966
2040	6.74957
2045	6.48429
2050	6.23844
2055	6.00108
2060	5.7896
2065	5.61836
2070	5.47193
2075	5.35377
2080	5.24445
2085	5.14039
2090	5.05235
2095	4.97419
2100	4.91055