# /research/projects/archive/wcp/stats/misc.htm

originally: http://www.oclc.org/research/projects/archive/wcp/stats/misc.htm

# Miscellaneous statistics

## Adult Web sites

Public Web sites whose primary content is sexually explicit images or text.

| No. of sites | Percent of public sites
--- | --- | ---
1998 | 34,000 | 2.3%
1999 | 42,000 | 1.9%
2000 | 68,000 | 2.3%
2001 | 74,000 | 2.4%
2002 | 102,000 | 3.3%

## IP address volatility

Percent of IP addresses identifying a Web site in Year A also identifying a Web site in Year B. For example, 56% of the IP addresses identifying a Web site in the 1998 sample also identified one in the 1999 sample.

### All sites

| 1998 | 1999 | 2000 | 2001 | 2002
--- | --- | --- | --- | --- | ---
1998 | 100% | 56% | 35% | 25% | 13%
1999 | NA | 100% | 55% | 37% | 19%
2000 | NA | NA | 100% | 55% | 33%
2001 | NA | NA | NA | 100% | 51%
2002 | NA | NA | NA | NA | 100%

### Public sites

| 1998 | 1999 | 2000 | 2001 | 2002
--- | --- | --- | --- | --- | ---
1998 | 100% | 52% | 28% | 15% | 8%
1999 | NA | 100% | 50% | 27% | 14%
2000 | NA | NA | 100% | 47% | 26%
2001 | NA | NA | NA | 100% | 46%
2002 | NA | NA | NA | NA | 100%