Census figures released Tuesday show that Pennsylvania will lose one seat next year in the U.S. House of Representatives, where population determines how many seats a state gets. While the population grew by more than three percent over the last decade, the growth was well below the national average of nearly 13 percent. Pennsylvania has been losing representation in congress for most of the last century. It hit a high of 36 house seats in the 1910’s and 1920’s and fell to 27 by 1960. Next year it will have 18 seats. It remains the sixth most populous state behind California, Texas, Florida, New York and Illinois.