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:
| Date | Opponent | Score | Loss | Attendance | Record |
| --- | --- | --- | --- | --- | --- |
| March 31 | @ Reds | 4 - 2 | Harang (0-1) | 42498.0 | 1-0 |
| April 2 | @ Reds | 6 - 5 | Lyon (0-1) | 14016.0 | 1-1 |
| April 3 | @ Reds | 3 - 2 | Davis (0-1) | 11987.0 | 1-2 |
| April 4 | @ Rockies | 8 - 1 | Redman (0-1) | 49233.0 | 2-2 |
| April 5 | @ Rockies | 7 - 2 | Francis (0-1) | 43124.0 | 3-2 |
| April 6 | @ Rockies | 5 - 2 (10) | Bowie (0-1) | 42865.0 | 4-2 |
| April 7 | Dodgers | 9 - 3 | Loaiza (0-2) | 49057.0 | 5-2 |
| April 8 | Dodgers | 10 - 5 | Billingsley (0-1) | 28973.0 | 6-2 |
| April 9 | Dodgers | 4 - 3 | Kuroda (1-1) | 23331.0 | 7-2 |
| April 11 | Rockies | 8 - 2 | Francis (0-2) | 31732.0 | 8-2 |
| April 12 | Rockies | 10 - 3 | Morales (0-1) | 29256.0 | 9-2 |
| April 13 | Rockies | 13 - 5 | González (0-1) | 31321.0 | 9-3 |
| April 14 | @ Giants | 5 - 4 | Qualls (0-1) | 30371.0 | 9-4 |
| April 15 | @ Giants | 8 - 2 | Correia (1-2) | 30068.0 | 10-4 |
| April 16 | @ Giants | 4 - 1 | Zito (0-4) | 30510.0 | 11-4 |
| April 18 | Padres | 9 - 0 | Maddux (2-1) | 26783.0 | 12-4 |
| April 19 | Padres | 10 - 3 | Thatcher (0-2) | 39726.0 | 13-4 |
| April 20 | Padres | 9 - 4 | Johnson (0-1) | 28090.0 | 13-5 |
| April 21 | Giants | 4 - 2 | Correia (1-3) | 22097.0 | 14-5 |
| April 22 | Giants | 5 - 4 | Zito (0-5) | 25074.0 | 15-5 |
| April 23 | @ Dodgers | 8 - 3 | Haren (3-1) | 42590.0 | 15-6 |
| April 24 | @ Dodgers | 6 - 4 | Billingsley (0-4) | 38350.0 | 16-6 |
| April 25 | @ Padres | 5 - 1 | Wolf (2-1) | 31340.0 | 17-6 |
| April 26 | @ Padres | 8 - 7 (13) | Petit (0-1) | 31295.0 | 17-7 |
| April 27 | @ Padres | 2 - 1 | Peavy (3-1) | 40074.0 | 18-7 |
| April 28 | Astros | 5 - 3 | Sampson (1-3) | 19868.0 | 19-7 |
| April 29 | Astros | 6 - 4 | González (1-2) | 20241.0 | 19-8 |
| April 30 | Astros | 8 - 7 | Borkowski (0-2) | 21519.0 | 20-8 |
Question:
What attendance has astros as the opponent, and april 29 as the date?
Answer:
20241.0