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:
| Home team | Home team score | Away team | Away team score | Venue | Crowd | Date |
| --- | --- | --- | --- | --- | --- | --- |
| Hawthorn | 7.14 (56) | South Melbourne | 11.15 (81) | Glenferrie Oval | 20000.0 | 15 April 1961 |
| Fitzroy | 6.10 (46) | Melbourne | 10.15 (75) | Brunswick Street Oval | 31787.0 | 15 April 1961 |
| Richmond | 11.8 (74) | Footscray | 15.12 (102) | Punt Road Oval | 20000.0 | 15 April 1961 |
| North Melbourne | 8.10 (58) | Essendon | 6.13 (49) | Arden Street Oval | 24000.0 | 15 April 1961 |
| Geelong | 13.18 (96) | Collingwood | 8.9 (57) | Kardinia Park | 23973.0 | 15 April 1961 |
| St Kilda | 5.8 (38) | Carlton | 6.12 (48) | Junction Oval | 30400.0 | 15 April 1961 |
Question:
What is the average crowd size when Collingwood is the away team?
Answer:
23973.0