Year	Percent
1950	10.80188
1955	9.78214
1960	10.07493
1965	9.37803
1970	9.289
1975	8.58988
1980	8.18331
1985	7.34424
1990	5.78551
1995	5.28633
2000	5.12386
2005	5.11364
2010	5.32504
2015	4.70601
2020	4.15361
2025	3.86284
2030	3.86804
2035	3.98726
2040	4.12069
2045	4.13925
2050	4.02666
2055	3.91252
2060	3.91939
2065	4.05652
2070	4.24487
2075	4.38477
2080	4.42409
2085	4.38485
2090	4.34638
2095	4.36489
2100	4.4383