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:
| Make | Year placed in service | Quantity | Number of seats | Wheelchair accessible? () | Current status |
| --- | --- | --- | --- | --- | --- |
| GM " New Look " | 1971, 1972 | 132.0 | 45.0 | No | Retired; one bus retained for historical purposes |
| GM Advanced Design | 1981 | 16.0 | 43.0 | Yes | Retired |
| GM Advanced Design | 1983 | 50.0 | 41.0 | Yes | Retired |
| Gillig | 1986 | 4.0 | 26.0 | Yes | Retired |
| MCI | 1987 | 21.0 | 45.0 | Yes | Retired |
| TMC | 1990 | 48.0 | 39.0 | Yes | Retired |
| TMC | 1991 | 49.0 | 40.0 | Yes | Retired (26), reserve fleet (10), for sale (13) |
| Flxible | 1994 | 40.0 | 45.0 | Yes | Retired |
| MCI | 1996, 1997 | 32.0 | 57.0 | Yes | For sale (21), unknown (11) |
| NovaBus | 1997 | 10.0 | 43.0 | Yes | Retired |
| New Flyer | 2003† | 8.0 | 62.0 | Yes | Retired |
Question:
What is the smallest number of seats in a retired vehicle that was started in service in 1981?
Answer:
43.0