年龄段 比例 | 15~19 | 20~24 | 25~29 | 30~34 | 35~39 | 40~44 | 45~49 |
2006 | 17% | 36% | 37% | 6% | 2% | 2% | 1% |
2007 | 18% | 36% | 33% | 7% | 2% | 1% | 2% |
2008 | 18% | 34% | 33% | 7% | 3% | 2% | 2% |
2009 | 18% | 35% | 32% | 7% | 3% | 2% | 2% |
2011 | 20% | 39% | 32% | 6% | 2% | 3% | 1% |
2012 | 20% | 39% | 29% | 7% | 2% | 3% | 1% |
2013 | 22% | 35% | 26% | 9% | 1% | 4% | 1% |
2015 | 21% | 38% | 27% | 8% | 1% | 3% | 1% |