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 |
| --- | --- | --- | --- | --- | --- | --- |
| Footscray | 10.14 (74) | Hawthorn | 11.18 (84) | Western Oval | 13789.0 | 23 May 1981 |
| Fitzroy | 13.15 (93) | Geelong | 16.18 (114) | Junction Oval | 15604.0 | 23 May 1981 |
| Carlton | 25.22 (172) | South Melbourne | 11.7 (73) | Princes Park | 22445.0 | 23 May 1981 |
| Melbourne | 10.10 (70) | Essendon | 14.20 (104) | MCG | 31769.0 | 23 May 1981 |
| North Melbourne | 12.26 (98) | Collingwood | 16.15 (111) | Arden Street Oval | 24625.0 | 23 May 1981 |
| Richmond | 20.16 (136) | St Kilda | 15.15 (105) | VFL Park | 40240.0 | 23 May 1981 |
Question:
What is the average crowd size for Richmond home games?
Answer:
40240.0