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 |
| --- | --- | --- | --- | --- | --- | --- |
| Collingwood | 12.12 (84) | South Melbourne | 6.8 (44) | Victoria Park | 24637.0 | 24 June 1961 |
| North Melbourne | 5.14 (44) | Melbourne | 14.9 (93) | Arden Street Oval | 11500.0 | 24 June 1961 |
| St Kilda | 8.11 (59) | Footscray | 4.13 (37) | Junction Oval | 28100.0 | 24 June 1961 |
| Geelong | 9.10 (64) | Fitzroy | 8.9 (57) | Kardinia Park | 16881.0 | 24 June 1961 |
| Richmond | 12.20 (92) | Essendon | 10.14 (74) | Punt Road Oval | 23000.0 | 24 June 1961 |
| Hawthorn | 12.6 (78) | Carlton | 6.10 (46) | Glenferrie Oval | 21500.0 | 24 June 1961 |
Question:
What was the average crowd size of games held at Glenferrie Oval?
Answer:
21500.0