Year	Percent
1950	15.74671
1955	11.01305
1960	18.5728
1965	15.23176
1970	18.05873
1975	15.56899
1980	10.25634
1985	10.66702
1990	10.11416
1995	9.95642
2000	9.11454
2005	8.34205
2010	7.41435
2015	7.08539
2020	7.02021
2025	6.89535
2030	6.60186
2035	6.20741
2040	5.87243
2045	5.72056
2050	5.72678
2055	5.72888
2060	5.63148
2065	5.45538
2070	5.29281
2075	5.20299
2080	5.18839
2085	5.18757
2090	5.14657
2095	5.06347
2100	4.97454