ECU Libraries Catalog
- 1908 to 1909 5,517
- 1910 to 1919 32,872
- 1920 to 1929 45,078
- 1930 to 1939 34,483
- 1940 to 1949 27,535
- 1950 to 1959 52,558
- 1960 to 1969 109,369
- 1970 to 1979 173,503
- 1980 to 1989 212,683
- 1990 to 1999 348,138
- 2000 to 2009 475,423
- 2010 to 2012 150,243