Year	Percent
1950	10.89634
1955	10.89684
1960	10.78367
1965	12.09265
1970	12.00889
1975	11.90424
1980	11.82001
1985	11.99363
1990	12.03069
1995	11.79629
2000	11.2233
2005	10.44342
2010	9.88369
2015	9.37209
2020	9.13361
2025	9.11331
2030	8.71671
2035	8.25859
2040	7.82481
2045	7.4838
2050	7.23494
2055	7.0101
2060	6.76387
2065	6.51458
2070	6.28336
2075	6.10555
2080	5.96854
2085	5.84728
2090	5.7396
2095	5.63138
2100	5.53519