International Day for the Elimination of Violence against Women 25 November - this is why it is important

The 25th November has been designated by the UN as International Day for the Elimination of Violence against Women

25 November. the 2019 theme is
‘Orange the World: Generation Equality Stands Against Rape’
The official website has messages and announcements from the day. It is difficult to give an exact figure for the number of women who have suffered sexual assaults as definitions and measurements differ. The UN page has a range of shocking data including:
"It is estimated that 35 per cent of women worldwide have experienced either physical and/or sexual intimate partner violence or sexual violence by a non-partner (not including sexual harassment) at some point in their lives. "
PAHO focuses on Latin America. Their 2019 resources page
includes a systematic review which revealed that experiences of intimate partner violence ranged from 14-17% of women in Brazil to over 58% in Bolivia

In the UK the Home Office website has the latest data on domestic violence and sexual assault
and the CPS have on their website policy statements on how rape allegations are prosecuted
the ONS website also has crime survey data and freedom of information requests regarding rape convictions. According to the latest release
"Rape offences have increased dramatically in England and Wales since 2012/13 when there were around 16.3 thousand incidents. After this year, rape offences increased to 20.75 thousand, then 29.3 thousand in 2014/15, before increasing to 35.8 thousand in 2015/16, and 41 thousand in 2016/17. In 2017/18 there were almost 54 thousand rape offences recorded by the Police in England and Wales, an increase of over ten thousand when compared with the previous year, the largest year-on-year increase in this period."

For comparisons with Europe see the Eurostat website . You can click through to data tables.