Mox, according to the US census in 2000, from the age of 20-44, the ratio changes to 98 men per 100 women. I would post a link but I dont think its allowed.
As to reducing the age gap – how do you plan to do that? The only way is that either:
a) men get married earlier (since women will still want to get married at 19)
b) women get married later (since the men don’t start dating until later)
Is it fair to rush the men into marriage? NO
Is it fair to postpone women getting married? NO
Neither option is fair, especially when you look at the numbers. Reducing the years between the men and women dating may or may not help. Look at the differences between ages in years – many years have virtually the same number of students so moving the age gap 1-2 years in either direction may not help. Its a lot to ask of the men and women to change their desires for marriage based on something that isn’t a sure thing.