How many different items appear in the enrollment column that join in 1931, 1949 1?
Institution Location Nickname Founded Type Enrollment Joined
Northwest Conference
text text text real text real text
1-261941-1
Current members
Current members
George Fox University Newberg, Oregon Bruins 1885 Private/Quaker 3519 1996
Lewis & Clark College Portland, Oregon Pioneers 1867 Private/Non-sectarian 3433 1931, 1949 1
Linfield College McMinnville, Oregon Wildcats 1849 Private/Baptist 2664 1926
Pacific University Forest Grove, Oregon Boxers 1849 Private/United Church of Christ 3302 1926
Pacific Lutheran University Tacoma, Washington Lutes 1890 Private/Lutheran 3461 1965
University of Puget Sound Tacoma, Washington Loggers 1888 Private/Non-sectarian 2600 1926, 1996 2
Whitman College Walla Walla, Washington Missionaries 1859 Private/Non-sectarian 1475 1926
Whitworth University Spokane, Washington Pirates 1890 Private/Presbyterian 2886 1970, 1988 3
table_261941_1
SELECT COUNT Enrollment FROM table WHERE Joined = 1931, 1949 1
1931, 1949 1