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:
| No. in series | No. in season | Title | Directed by | Written by | Original air date | Production code | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 14.0 | 1.0 | "Let It Snow" | Christopher Chulack | Ann Biderman and John Wells | January4,2011 | 3X6751 | 2.11 |
| 15.0 | 2.0 | "Punching Water" | Christopher Chulack | Cheo Hodari Coker | January11,2011 | 3X6752 | 1.64 |
| 16.0 | 3.0 | "Discretion" | Nelson McCormick | Jonathan Lisco | January18,2011 | 3X6753 | 2.11 |
| 19.0 | 6.0 | "Cop or Not" | J. Michael Muro | Cheo Hodari Coker | February8,2011 | 3X6756 | 1.80 |
| 20.0 | 7.0 | "Sideways" | Allison Anders | Jonathan Lisco | February15,2011 | 3X6757 | 1.98 |
Question:
How many viewers tuned in for season 2?
Answer:
1.64