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:
| School | Location | Mascot | County | Year Joined | Year Left |
| --- | --- | --- | --- | --- | --- |
| Barr Township | Montgomery | Vikings | 14 Daviess | 1939 | pre-1958 |
| Ellettsville | Ellettsville | Golden Eagles | 53 Monroe | 1939 | 1964 |
| Loogootee | Loogootee | Lions | 51 Martin | 1939 | 1970 |
| Oolitic | Oolitic | Bearcats | 47 Lawrence | 1939 | 1974 |
| Plainville | Plainville | Midgets | 14 Daviess | 1939 | pre-1958 |
| Shoals * | Shoals | Jug Rox | 51 Martin | 1939 1962 | pre-1958 1979 |
| West Baden | West Baden | Sprudels | 59 Orange | 1939 | pre-1958 |
| Central (Switz City) | Switz City | Tigers | 28 Greene | pre-1958 | 1990 |
| Needmore | Needmore | Hilltoppers | 47 Lawrence | pre-1958 | 1974 |
| Odon | Odon | Bulldogs | 14 Daviess | pre-1958 | 1968 |
| Shawswick | Shawswick | Farmers | 47 Lawrence | pre-1958 | 1974 |
| Spencer | Spencer | Cops | 60 Owen | pre-1958 | 1970 |
| Worthington | Worthington | Ramblers | 28 Greene | pre-1958 | 1990 |
| Edgewood | Ellettsville | Mustangs | 53 Monroe | 1964 | 1970 |
| L & M | Marco | Braves | 28 Greene | 1968 | 1990 |
Question:
Which year did the school with the mascot of the Vikings join?
Answer:
1939.0