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:
| Code | County | Former Province | Area (km 2 ) | Population Census 2009 | Capital |
| --- | --- | --- | --- | --- | --- |
| 1.0 | Mombasa | Coast | 212.5 | 939370.0 | Mombasa (City) |
| 2.0 | Kwale | Coast | 8,270.3 | 649931.0 | Kwale |
| 3.0 | Kilifi | Coast | 12,245.9 | 1109735.0 | Kilifi |
| 4.0 | Tana River | Coast | 35,375.8 | 240075.0 | Hola |
| 5.0 | Lamu | Coast | 6,497.7 | 101539.0 | Lamu |
| 6.0 | Taita-Taveta | Coast | 17,083.9 | 284657.0 | Voi |
Question:
 how many capital with population census 2009 being 284657
Answer:
1.0