Table:
text: Southwestern Indiana Conference
Former Members
Former Members
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

Question: In what year did the school with the Viking mascot join the former members of the Southwestern Indiana Conference?