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:
| Season | Ave. Attendance | +/- ave. on prev. season | Competition | Occupier |
| --- | --- | --- | --- | --- |
| 1992–93 | 322.0 | N/A | Southern Football League | Rushden and Diamonds |
| 1993–94 | 966.0 | +644 | Southern Football League | Rushden and Diamonds |
| 1994–95 | 1521.0 | +855 | Southern Football League | Rushden and Diamonds |
| 1995–96 | 2166.0 | +645 | Southern Football League | Rushden and Diamonds |
| 1996–97 | 2514.0 | +348 | Conference National | Rushden and Diamonds |
| 1997–98 | 2552.0 | +38 | Conference National | Rushden and Diamonds |
| 1998–99 | 3041.0 | +489 | Conference National | Rushden and Diamonds |
| 1999–2000 | 3298.0 | +257 | Conference National | Rushden and Diamonds |
| 2000–01 | 3876.0 | +578 | Conference National | Rushden and Diamonds |
| 2001–02 | 4403.0 | +527 | Third Division | Rushden and Diamonds |
| 2002–03 | 4323.0 | -80 | Third Division | Rushden and Diamonds |
| 2003–04 | 4457.0 | +134 | Second Division | Rushden and Diamonds |
| 2004–05 | 3321.0 | -1,136 | League Two | Rushden and Diamonds |
| 2005–06 | 3162.0 | -159 | League Two | Rushden and Diamonds |
| 2006–07 | 2045.0 | -1,117 | Conference National | Rushden and Diamonds |
| 2007–08 | 1586.0 | -459 | Conference National | Rushden and Diamonds |
| 2008–09 | 1509.0 | -77 | Conference National | Rushden and Diamonds |
| 2009–10 | 1678.0 | +169 | Conference National | Rushden and Diamonds |
| 2010–11 | 1255.0 | -423 | Conference National | Rushden and Diamonds |
| 2011–12 | 1399.0 | +144 | Conference National | Kettering Town |
Question:
What is the least value for average attendance when average on previous season is +644?
Answer:
966.0