Does the UK have a high or low birth rate?

On a list of 221 countries in the world, the UK is listed at 161, ie 12.27 births per thousand of the population. This compares with Niger at number 1 with over 50 births per thousand of the population and the United States at number 147 with 13.67 births per thousand of the population. It would seem that most of the top one hundred of high birth rates are nearly all third world countries. Returning to the UK, the highest Birth Rate seems to be among immigrant families and indigenous families who tend to be unemployed or in low income jobs. The birth rate in the professional groups seems to be falling, which doesn't bode well for the future.