Year	Percent
1950	9.44473
1955	8.47734
1960	7.32213
1965	6.85365
1970	10.33049
1975	10.31379
1980	10.69309
1985	10.06995
1990	9.26542
1995	9.39468
2000	8.60528
2005	8.89283
2010	9.06779
2015	8.47288
2020	7.6802
2025	6.73491
2030	6.85555
2035	6.5287
2040	6.11982
2045	5.73673
2050	5.43076
2055	5.23157
2060	5.17236
2065	5.17066
2070	5.11285
2075	5.01674
2080	4.92027
2085	4.86929
2090	4.86322
2095	4.8828
2100	4.87428