Year collected
- 1903 to 1909526 objects
- 1910 to 19192 objects
- 1920 to 19296 objects
- 1930 to 19392 objects
- 1940 to 194949 objects
- 1950 to 19591 objects
- 1960 to 196974 objects
- 1970 to 197935 objects
- 1980 to 19893 objects
- 1990 to 19998 objects
- 2000 to 200412 objects