Facebook grew by nearly 5 million people in the United States last month, from 108 million to 113 million. The service has gained around this amount every month starting about midway through last year, and it doesn’t appear to be slowing.

Growth is also across-the-board, in terms of user demographics, although men of all ages appeared to be joining in greater numbers and growth rates. The result can be seen (barely) in the overall gender breakdown. The site was 56.07% female in January, and in February it fell to 55.60%.

Women continue to comprise the majority of each age group, as you can see from the data. And the largest groups continue to be people aged 18 to 25 and 26 to 34. However, enough women between 35 and 44 that their numbers are close to men in the next-lowest group, at more than 10.7 million.

The men are going where the women are, as we’ve noticed in past months. Among those between 18 and 44, around twice as many men as women joined in February. However, above 44, more women than men continued to join the site — out of all groups we track, older men continue to be the least represented on Facebook.

Older men’s lower numbers means that growth in the demographic will be higher, percentage-wise, which you can see, above. Even though fewer men between ages 45 and 54 joined than their female counterparts, the growth rate is greater.

Despite all the parents and grandparents continuing to join, most Facebook users are still relatively young.

The caveat with this data is that we get it from Facebook’s advertising tool — the numbers are typically at least a few weeks behind current statistics. For example, third party analytics services reported similar overall US traffic numbers for Facebook in January, not February.