(NEXSTAR) – The years go on, yet one societal problem remains relatively unchanged: the wage gap between men and women. A recent Pew Research Center analysis found the pay gap has stayed stubbornly stable for the past 20 years.

MoneyGeek, a personal finance site, used data from the Bureau of Labor Statistics and the Census Bureau’s 2021 American Community Survey to determine where the pay gap is worst in the U.S.

At the very bottom ranks Wyoming, where women on average make about 69% as much as men do.

Researchers at the University of Wyoming took a look at the state’s gender wage gap earlier this month. They use a slightly different methodology, but came to the same conclusion: Wyoming ranks dead last.

“Regardless of methodology, Wyoming consistently ranks last or near last in wage gap analyses, even when adjusted for cost of living and regional prices. Over the course of a year, this wage gap results in an estimated loss of $1.5 billion to the Wyoming economy,” economists Anne Alexander and Chian Jones Ritten said in their report. “The average working woman in Wyoming loses enough money during a year from the gender wage gap to buy a total of 108 more weeks of food, 12 more months of mortgage and utilities payments, 21 more months of rent or 8,402 additional gallons of gas.”

The nationwide average is better, but a gap still exists. Women in the U.S. typically make about 83% of what men earn annually. The gap is even wider for Latina and Black women.

One contributing factor, Pew’s analysis found, is the fact that women are overrepresented in low-wage work. A majority of women polled also said they believe employers’ discrimination plays a role.

The worst 15 states for gender pay equity, according to MoneyGeek’s analysis of Census and BLS data, are seen in the chart below.

StateWomen’s pay (as % of men’s)Men’s median annual payWomen’s median annual pay
6New Hampshire75.7%$68,566$51,880
7West Virginia76.8%$51,981$39,897
11South Carolina77.9%$52,296$40,739

Meanwhile, the states with the smallest pay gaps between men and women include Vermont, Alaska, New York, California and Maryland.

Even in Vermont, which ranked No. 1, total parity has not been achieved. Women still make about 93% of men’s earnings, on average.

While the pay gap has narrowed in the United States in recent years, that’s not necessarily the case for women around the world.

In the Philippines, hundreds of protesters marked International Women’s Day by rallying in Manila for higher wages and decent jobs.

“We are seeing the widest gender pay gap,” protest leader Joms Salvador said. “We are seeing an unprecedented increase in the number of women workers who are in informal work without any protection.”

Elsewhere, tens of thousands of people marched in Paris and other French cities, brandishing posters with the messages “Equal Pay, Now” and “Solidarity with the world’s women.” The rallies focused on protesting proposed changes to the pension system, which women’s group say are unfair to working mothers.

The Associated Press contributed to this report.