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:
| By-election | Electorate | Date | Incumbent | Reason | Winner |
| --- | --- | --- | --- | --- | --- |
| 1880.0 | Rangitikei | 8 May | William Jarvis Willis | Resignation | William Fox |
| 1880.0 | Waitaki | 16 June | Thomas William Hislop | Resignation | George Jones |
| 1880.0 | Waikaia | 21 September | George Ireland | Death | Horace Bastings |
| 1881.0 | Suburbs of Nelson | 11 January | Andrew Richmond | Death | Arthur Collins |
| 1881.0 | Southern Maori | 1 March | Ihaia Tainui | Resignation | Hori Kerei Taiaroa |
| 1881.0 | City of Nelson | 7 June | Acton Adams | Resignation | Henry Levestam |
Question:
When waikaia is the electorate what is the highest by-election?
Answer:
1880.0