The Data Digest provides annual trend data for many diversity-related faculty and staff statistics.  Data on faculty and staff is available from Pages 35-49, and many of the trends are broken down by Gender and Race/Ethnic Category.  Click on the Data Digest link for more information and individual work files of these pages. 

Faculty and Staff Trends Related to Gender and Diversity

Faculty and Staff Trends by Gender and Ethnic Status (annual reports to the Committee on Women):
June 2016, August 2015, July 2014, July 2013, September 2012, March 2011, March 2010, March 2009, March 2008

Faculty Trends - Racial/Ethnic Diversity and Gender, Report to Leadership Council, March 2009

Faculty Pay Equity

Starting in the early 1990's UW-Madison established policies related to equity in relation to faculty salaries, first as it related to gender and more recently for all individuals.  Visit the Office of the Provost web site for information about current policies and activities related to faculty salary equity, and other salary initiatives. 
See also information at this site related to faculty compensation.
For historical context see also, 1997 Study of Gender Equity in Faculty Salaries and Report on the 2000-01 Faculty Gender Pay Equity Exercise at the University of Wisconsin-Madison