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:
| Rank | English title | Chinese title | Average | Peak | Premiere | Finale | HK viewers |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Can't Buy Me Love | 公主嫁到 | 34.0 | 45.0 | 33.0 | 35.0 | 2.15 million |
| 2.0 | No Regrets | 巾幗梟雄之義海豪情 | 33.0 | 47.0 | 31.0 | 34.0 | 2.11 million |
| 3.0 | The Mysteries of Love | 談情說案 | 32.0 | 42.0 | 31.0 | 35.0 | 2.04 million |
| 4.0 | A Pillow Case of Mystery II | 施公奇案 II | 31.0 | 39.0 | 30.0 | 31.0 | 1.99 million |
| 5.0 | A Watchdog's Tale | 老友狗狗 | 31.0 | 36.0 | 30.0 | 31.0 | 1.97 million |
| 6.0 | When Lanes Merge | 情越雙白線 | 31.0 | 37.0 | 29.0 | 32.0 | 1.96 million |
| 7.0 | Every Move You Make | 讀心神探 | 31.0 | 36.0 | 29.0 | 32.0 | 1.95 million |
| 8.0 | Gun Metal Grey | 刑警 | 30.0 | 36.0 | 30.0 | 30.0 | 1.92 million |
| 9.0 | Ghost Writer | 蒲松齡 | 30.0 | 41.0 | 28.0 | 33.0 | 1.91 million |
Question:
What is the largest average for the episode with 1.97 million Hong Kong viewers?
Answer:
31.0