Category 1974 1975 1976 1977 Total TTWB 905 1036 1027 1321 TTWO 232 299 278 425 Both 390 506 467 579 Student 292 231 282 317 New 387 315 446 Contributing 2 4 4 9* Library 21 34 49 48 Affiliate 51 44 43 Lost from previous year 291 442 224 Recovered from 75 ($57.46 to mail 442 cards 151