请阅读下面这张Markdown格式的表格并回答问题。同一行中不同列的单元格用'|'分隔，不同行的单元格用'
'分隔。

表格标题:
44 表4： 重点城市周均环比续（单位：%） 
表格:
| 时间 | 无锡 | 宁波 | 福州 | 东莞 | 厦门 | 长沙 | 昆明 | 济南 | 哈尔滨 | 大连 | 南昌 | 佛山 | 惠州 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2011/6/4 | 10.28 | -31.15 | 150.8 | 61.58 | 54.14 | 5.42 | 11.27 | -6.91 | 6.09 | -45.02 | -22.87 | -12.02 | -8.68 |
| 2011/6/11 | -40.93 | 68.61 | 62.69 | -59.33 | -62.01 | -33.91 | -17.75 | -29.67 | -45.78 | 22.65 | -38.31 | -37.27 | -16.97 |
| 2011/6/18 | 54.58 | -13.86 | -56.62 | 22.8 | 82.08 | 10.08 | 12.44 | 29.59 | 11.02 | -17.94 | 52.98 | -53.47 | 25.34 |
| 2011/6/25 | -11.45 | -6.56 | 132.93 | -3.3 | -11.66 | -10.71 | -5.3 | -23.15 | 6.61 | 6.43 | 138.3 | 297.87 | 2.61 |
| 2011/7/2 | 28.19 | -9.25 | -37.48 | 66.78 | -12.9 | 48.19 | -31.82 | 15.13 | 18.61 | -4.53 | -16.65 | 101.07 | 15.25 |
| 2011/7/9 | -15.8 | 58.7 | -33.4 | -49.15 | 17.85 | -23.79 | -1.75 | -17.44 | -2.31 | 8.86 | -9.7 | -11.17 | -11.95 |
| 2011/7/16 | 18.61 | -9.08 | 9.97 | 18.75 | 38.29 | -14.72 | 1.96 | 1.88 | 223.62 | 25.0 | -13.17 | 30.24 | -16.28 |
| 2011/7/23 | -12.17 | 24.0 | -3.68 | 32.51 | -8.26 | 17.81 | 4.71 | 17.05 | 132.17 | -26.51 | -29.01 | 39.77 | 4.74 |
| 2011/7/30 | 17.59 | -35.56 | 15.29 | -16.95 | -10.36 | 12.52 | 76.0 | -3.4 | -72.27 | 21.52 | 6.02 | -22.04 | 26.67 |
| 2011/8/6 | -12.6 | -8.99 | -27.3 | 7.86 | 20.6 | -26.4 | -12.88 | 9.17 | -35.98 | -22.4 | 50.88 | 64.98 | -12.22 |
| 2011/8/13 | -28.44 | 6.87 | -21.4 | 0.49 | -10.42 | -1.43 | -4.35 | -32.57 | -35.18 | -15.44 | -26.85 | -51.53 | 14.13 |
| 2011/8/20 | -7.16 | -27.9 | 28.13 | -30.88 | -25.12 | 0.0 | 8.3 | -29.35 | 227.14 | 11.51 | -26.6 | -0.26 | -28.52 |
问题:
什么时候无锡周均环比或者宁波周均环比都大于了0
Answer:
2011/6/4
2011/6/11
2011/6/18
2011/7/2
2011/7/9
2011/7/16
2011/7/23
2011/7/30
2011/8/13