Thank you.

it says ~1600 is the average number of women killed by intimate partners.

They key phrase there is "intimate partners." Pretending that the number of female people killed each year = the number of women killed by intimate partners leaves out half the female homicide victims in the US in any given year. Fact is, whilst intimate partner killings account for a lot of the homicides of females, they sure don't account for all! In fact, these killings only account for half of female homicide deaths in the US each year.

About 10-12% of females who die of homicide in the US annually are killed not by people the girls or women were ever intimate partners with, but by a range of people, including total strangers, acquaintances, co-workers, neighbors, carers, men who just got sight of their victims somewhere and stalked them, johns in the case of prostitutes, and indiscriminate mass killers including terrorists, serial killers, and shooters who on a fairly regular basis in the US rain bullets into schools, workplaces, malls, places of worship and other public gatherings.

In any given year, at least 35% of homicides in the US (and countries such as the UK) have no known suspects, so it's not known if they were killed by intimate partners or someone else. The remainder of females who die of homicide in the US each year are killed by their parents or one of their parent's BFs, by their children (particularly sons), or by other family members such as brothers or various relatives acting together in cases of familial "honor killings" amongst certain subcultures in the US population.

Whatever the relationship - or lack of one - between females in the US who die of homicide and their killers, these girls and women are almost always killed by males. From decades of investigating and study, we know that males in the US commit 91% of all homicides, and nearly 100% killers of female people are male. Females commit only 2% of killings in which the victims are female.