Year	Percent
1950	9.13536
1955	7.97255
1960	8.10597
1965	8.86791
1970	10.4776
1975	9.75793
1980	8.52887
1985	7.56642
1990	8.56437
1995	9.33808
2000	8.77299
2005	8.06968
2010	7.07007
2015	5.62374
2020	5.08916
2025	5.47692
2030	5.57235
2035	5.56881
2040	5.41576
2045	5.10263
2050	4.83919
2055	4.85056
2060	5.05335
2065	5.22328
2070	5.2636
2075	5.18751
2080	5.0711
2085	5.02056
2090	5.07254
2095	5.15759
2100	5.19829