Information about the book Bowling Alone can be found at the following web address, and data used for the book can also be downloaded:
The data are available in SPSS format. The file is large and will take a long time to download on a dial-up connection. The SPSS file contains 85,000 cases and takes 35 megabytes of disk space.
If any students want, I can create smaller SPSS files for specific years over the 1975-1998 period covered by the survey data. Just let me know if you want such a file. You can look at the above web address to find further information on the study.