Final answer:
The percentage of women in the IT profession declined from 31 percent in 1990 to 25 percent by 2020, highlighting the gender disparity in the field.
Step-by-step explanation:
According to the data present in the various sources cited, the percentage of women in the information technology (IT) profession has been on the decline. In 1990, women constituted 31 percent of the IT workforce, but by 2020, this figure dropped to 25 percent. This is in stark contrast to the fact that women make up 47 percent of all employed adults in the United States. The situation is similar in other STEM fields, with women receiving less than half of doctoral degrees in science and holding less than one-third of tenure-track positions at the Ph.D. level.