Year	Percent
1950	8.12734
1955	10.29732
1960	11.38572
1965	11.21507
1970	9.70471
1975	8.77767
1980	8.47942
1985	8.76754
1990	8.59076
1995	7.67387
2000	6.07582
2005	5.56432
2010	6.56248
2015	6.96726
2020	6.41065
2025	5.83469
2030	5.47468
2035	5.44736
2040	5.62742
2045	5.75301
2050	5.63606
2055	5.37098
2060	5.16748
2065	5.13034
2070	5.20412
2075	5.26242
2080	5.21313
2085	5.06418
2090	4.91743
2095	4.85014
2100	4.85873