Year	Percent
1950	12.23138
1955	12.52426
1960	12.9105
1965	11.65502
1970	12.08796
1975	12.5996
1980	12.87257
1985	12.7574
1990	12.58684
1995	12.56193
2000	12.47752
2005	12.33452
2010	12.25905
2015	11.65273
2020	11.70799
2025	11.77283
2030	11.18428
2035	10.59584
2040	10.15074
2045	9.85991
2050	9.6207
2055	9.4
2060	9.11511
2065	8.77525
2070	8.46313
2075	8.2129
2080	7.98973
2085	7.76794
2090	7.53676
2095	7.30452
2100	7.06916