Year	Percent
1950	12.10794
1955	12.11711
1960	12.03683
1965	11.90902
1970	12.31811
1975	12.65447
1980	12.64051
1985	12.96308
1990	13.18108
1995	13.14182
2000	12.92485
2005	12.90416
2010	13.25745
2015	13.30232
2020	12.80488
2025	12.40358
2030	12.19764
2035	11.99665
2040	11.72723
2045	11.38603
2050	11.02883
2055	10.71093
2060	10.4222
2065	10.1493
2070	9.8371
2075	9.53681
2080	9.24748
2085	8.97994
2090	8.72555
2095	8.46799
2100	8.21206