Here are a few sources of more recent statistics:
The National Domestic Violence Hotline cites several surveys from 2004-2006. References are included.
The National Institute of Justice has a web page with Research Results on Violence Against Women that cites a number of government and academic research studies on the topic.
Statistical tables on Criminal Victimization In The United States from the Bureau of Justice Statistics. See the section called Victims and Offenders (2007).
Specific reports that might help:
Intimate Partner Violence: Justice System Response and Public Health Service Utilization in a National Sample. March 2009.
One sample statistic from the report: "In 2001, there were 691,710 nonfatal violent victimizations committed by intimate partners (i.e., current or former spouses, boy/girlfriends). About 85% of these victimizations by intimate partners were against women."
[See more reports from the National Institute of Justice here.]
Intimate Partner Violence, 1993-2001. From the Bureau of Justice Statistics.
"Intimate partners committed 20 percent of non-fatal violence against women in 2001"
Extent, Nature, and Consequences of Intimate Partner Violence: Findings From the National Violence Against Women Survey, July 2000.
"Nearly 25 percent of surveyed women and 7.6 percent of surveyed men said they were raped and/or physically assaulted by a current or former spouse, cohabiting partner, or date at some time in their lifetime."
Facts about Domestic Violence from Violence Against Women Online Resources.
"Domestic violence is a gender-based crime with women being more likely to experience domestic violence than men. According to the National Violence Against Women Survey (NVAWS) about 1.5 million women are raped and/or physically assaulted by an intimate partner annually( Tjaden & Thoennes, 2000). According to the Bureau of Justice Statistics Crime Data Brief, which measured only physical assaults, "there were 691,710 nonfatal violent victimizations committed by current or former spouses, boyfriends, or girlfriends of the victims during 2001(Rennison, 2003). Of these, 85% were against women(Rennison, 2003). The NVAWS also found that 22.1 percent of women surveyed, compared to 7.4 percent of men, reported being physically assaulted by a current or former partner in their lifetime(Rennison, 2003 )."
This organization's other reports might be of interest.