| 日期/Date | 事件/Event | 地點/Location |
| 2010/5/18 | MDU, TE, ED, SE at American Gas Association Financial Forum | |
| 2010/5/18 | MDU, TE, ED, SE at American Gas Association Financial Forum | |
| 2010/5/18 | MDU, TE, ED, SE at American Gas Association Financial Forum | |
| 2010/5/18 | MDU, TE, ED, SE at American Gas Association Financial Forum | |
| 2010/5/18 | MDU, TE, ED, SE at American Gas Association Financial Forum | |
| 2010/5/18 | MDU, TE, ED, SE at American Gas Association Financial Forum | |