I love this map! I’ve seen this data before, but it was always presented in a static format. Using this map, however, you can change the age range.
I am rather suprised it varies so much from youth to aged: more single males at the younger range and more single females (assuming their spouses have died) at the older range. Perhaps nature balances things out in the middle by having more guys born since we don’t seem to live nearly as long as the women. Also of interest to me is where these populations seem to cluster geographically.
You can adjust the age range sliders on both sides and drag. Here is a 10 year spread around my age group. Even in my age range, already single women are beginning to dominate the population centers. Click to enlarge. Use the above link to visit the interactive map.