Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Airing date | English title (Chinese title) | Number of episodes | HD format | Highest average point ratings | Genre | Official website |
| --- | --- | --- | --- | --- | --- | --- |
| 24 Dec 2007- 18 Jan 2008 | Survivor's Law II 律政新人王II | 20.0 | No | 31.0 | Modern drama | Official website |
| 21 Jan- 15 Feb | The Gentle Crackdown II 秀才愛上兵 | 20.0 | No | 32.0 | Costume comedy | Official website |
| 18 Feb- 15 Mar | The Seventh Day 最美麗的第七天 | 20.0 | No | 34.0 | Modern romance | Official website |
| 17 Mar- 18 Apr | D.I.E. 古靈精探 | 25.0 | No | 37.0 | Modern action | Official website |
| 21 Apr- 16 May | Catch Me Now 原來愛上賊 | 20.0 | Yes | 33.0 | Modern action | Official website |
| 19 May- 27 Jun | Forensic Heroes II 法證先鋒II | 30.0 | No | 34.0 | Modern suspense | Official website |
| 30 Jun- 25 Jul | Love Exchange 疑情別戀 | 20.0 | Yes | 32.0 | Modern thriller | Official website |
| 28 Jul- 21 Sep | Moonlight Resonance 溏心風暴之家好月圓 | 40.0 | Yes | 47.0 | Modern drama | Official website |
| 22 Sep- 18 Oct | Last One Standing 與敵同行 | 21.0 | Yes | 31.0 | Modern suspense | Official website |
| 20 Oct 2008- 13 Feb 2009 | The Gem of Life 珠光寶氣 | 82.0 | Yes | 32.0 | Modern drama | Official website |
Question:
What was the highest average point rating for a modern suspense show with 21 episodes?
Answer:
31.0