ECU Libraries Catalog
- 1937 to 1939 8,297
- 1940 to 1944 12,329
- 1945 to 1949 15,222
- 1950 to 1954 22,127
- 1955 to 1959 30,451
- 1960 to 1964 46,303
- 1965 to 1969 63,082
- 1970 to 1974 78,511
- 1975 to 1979 95,044
- 1980 to 1984 92,143
- 1985 to 1989 120,579
- 1990 to 1994 153,067
- 1995 to 1999 195,172
- 2000 to 2004 221,820
- 2005 to 2009 254,394