I’m surprised at that.
I would have expected the deaths of males in WW1 and WW2 would have swung the balance the other way.
I would have thought so too. So many men get killed in wars, on motorcycles and in other accidents. It wasn’t until sometime after WWII that the balance shifted.
There was a sociologist at Harvard by the name of Guttentag who wrote a book about it. I think the title was Too Many Women. Oral contraceptives just happened to come along at the time men became the minority and got the upper hand. The opposite is happening in China right now.