Near where my grandparents are buried are five tombstones (I counted one time when visiting while my Mom tended the flowers) where the husband was more than 10 years older than the wife, and still outlived her..

Typical is something like "Joe, born 1902, died 1994", married 1937 to  "Anna, born 1917, died 1986"..and you can tell, these are not second time around marriages.. Statistically odd, yet, anecdotally, there are five in close proximity to each other in one small graveyard..I am sure that when young Anna was marrying someone 15 years older than her, many were thinking she would be a widow for a long time...