ECU Libraries Catalog
- 1874 to 1879 8,198
- 1880 to 1889 14,850
- 1890 to 1899 18,498
- 1900 to 1909 27,072
- 1910 to 1919 32,875
- 1920 to 1929 45,088
- 1930 to 1939 34,493
- 1940 to 1949 27,551
- 1950 to 1959 52,578
- 1960 to 1969 109,385
- 1970 to 1979 173,555
- 1980 to 1989 212,722
- 1990 to 1999 348,239
- 2000 to 2009 476,214
- 2010 to 2015 291,843