Year	Percent
1950	8.41263
1955	9.39362
1960	8.75557
1965	8.02075
1970	7.45567
1975	7.29731
1980	7.45149
1985	7.52108
1990	6.6487
1995	6.23748
2000	5.1612
2005	4.03447
2010	4.28642
2015	4.93679
2020	4.8168
2025	4.79419
2030	4.68466
2035	4.49163
2040	4.41576
2045	4.60758
2050	4.84145
2055	4.92324
2060	4.89088
2065	4.82302
2070	4.79857
2075	4.86733
2080	4.98389
2085	5.04896
2090	5.0133
2095	4.92283
2100	4.84922