The proportion of women employed in the information and communications tech sector plumbed a long-term low at the start of the year, employment data shows, as the tech sector struggles to address its lack of diversity.

Trend data from the Australian Bureau of Statistics on industry and sub-industry employment for February 2017 shows that just 35% of people working in the Information, Media and Telecommunications category were women -- the lowest level since 1990. In raw numbers, that was 72,100 -- the second-lowest number of female employees since 1995. And the proportion of women in the telecommunications sub-category was 22% -- and the first time since 1993 that the number of women in that sub-sector fell below 20,000.