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:
| Year | Division | League | Reg. Season | Playoffs | Open Cup |
| --- | --- | --- | --- | --- | --- |
| 1974 | 1 | NASL | 1st, Western | Champions | Did not enter |
| 1975 | N/A | NASL Indoor | 3rd, Region 4 | Did not qualify | N/A |
| 1975 | 1 | NASL | 3rd, Western | Quarterfinals | Did not enter |
| 1976 | 1 | NASL | 3rd, Pacific Southern | 1st Round | Did not enter |
| 1977 | 1 | NASL | 3rd, Pacific Southern | Semifinals | Did not enter |
| 1978 | 1 | NASL | 4th, National Western | Did not qulaify | Did not enter |
| 1979 | 1 | NASL | 2nd, National Western | Conference Semifinals | Did not enter |
| 1979–80 | N/A | NASL Indoor | 5th, Western | Did not qualify | N/A |
| 1980 | 1 | NASL | 2nd, National Western | Conference Championships | Did not enter |
| 1980–81 | N/A | NASL Indoor | 1st, Western | 1st Round | N/A |
| 1981 | 1 | NASL | 2nd, Western | 1st Round | Did not enter |
Question:
What year had a 1st round playoff in the NASL indoor league?
Answer:
1980–81