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DATABASE
- Currently, seven datasets (1994, 1996, 1997, 1998,
1999, 2001, and 2004) are publicly released. If you need help,
please contact us. See CONTACT.
Some data files are provided as zip files. You may unzip them.
- Before downloading these files, please let us know
your name, affiliation, and contact information. See CONTACT.
- You should not use any of datasets or information
of this website for any kind of commercial purposes.
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