Year	Percent
1950	11.29019
1955	10.18225
1960	11.09459
1965	12.74695
1970	11.26577
1975	10.24297
1980	10.40206
1985	9.1702
1990	8.69124
1995	8.88884
2000	8.412
2005	7.80905
2010	6.66783
2015	6.02322
2020	5.51623
2025	5.67912
2030	5.69432
2035	5.56091
2040	5.29933
2045	5.03471
2050	4.91175
2055	4.95042
2060	5.05657
2065	5.10778
2070	5.05244
2075	4.95343
2080	4.89223
2085	4.90895
2090	4.97133
2095	5.0042
2100	4.98841