Type Ib/c and II-L, and possibly most Type IIn, supernovae are only thought to be produced from stars having near-solar metallicity levels that result in high mass loss from massive stars, hence they are less common in older, more-distant galaxies.
The authors found that the average American woman's waist circumference has increased 2.6 (from 34.9 to 37.5) over the last 21 years, which accounts for the increase in clothing size. While 16-18 was the average size for all women, the study found that Black women in particular currently wear a size 18-20 on average.
June 12, 2015. The average American woman weighs 166.2 pounds, according to the Centers for Disease Control and Prevention. As reddit recently pointed out, that's almost exactly as much as the average American man weighed in the early 1960s. Men, you're not looking too hot in this scenario either. Over the same time period you gained nearly 30 pounds, from 166.3 in the 60s to 195.5 today. Doing the same comparison as above, today's American man weighs almost as much as 1.5 American women from the 1960s. At 195.5 pounds, put five American guys in a room and you've gathered roughly half a ton of manhood.