Year	Percent
1950	12.55537
1955	8.27641
1960	8.44364
1965	14.04425
1970	13.59403
1975	15.28677
1980	16.17001
1985	13.43321
1990	13.04292
1995	13.9343
2000	14.78702
2005	13.50355
2010	11.76746
2015	10.61866
2020	9.80059
2025	9.08408
2030	8.70264
2035	8.18412
2040	7.58375
2045	7.0319
2050	6.59178
2055	6.26325
2060	6.01341
2065	5.79759
2070	5.6086
2075	5.44418
2080	5.30577
2085	5.20531
2090	5.13701
2095	5.07674
2100	5.02653