| 测试年份 | 总样本 | 男 | 女 | 城市 | 农村 |
| 2010 | 2672 | 1110 (41.54) | 1562 (58.46) | 877 (32.82) | 1794 (67.14) |
| 2011 | 3300 | 1226 (37.15) | 2074 (62.85) | 1021 (30.94) | 2279 (69.06) |
| 2012 | 3181 | 1182 (37.16) | 1999 (62.84) | 1166 (36.66) | 2015 (63.34) |
| 2013 | 3080 | 1195 (38.80) | 1885 (61.20) | 1243 (40.36) | 1837 (59.64) |
| 2014 | 3388 | 1409 (41.59) | 1979 (58.41) | 1396 (41.20) | 1992 (58.80) |
| 2015 | 3058 | 1339 (43.79) | 1719 (56.21) | 1324 (43.30) | 1734 (56.70) |
| 2016 | 3747 | 1485 (39.63) | 2262 (60.37) | 1481 (39.52) | 2266 (60.48) |
| 2017 | 3817 | 1723 (45.14) | 2094 (54.86) | 1654 (43.33) | 2163 (56.67) |
| 2018 | 3619 | 1791 (49.49) | 1828 (50.51) | 1659 (45.84) | 1960 (54.16) |
| 2019 | 3811 | 1841 (48.31) | 1970 (51.69) | 1815 (47.63) | 1996 (52.37) |