Midwifery, the practice supporting a natural approach to birth, enjoyed a revival in the United States during the 1970s. Ina May Gaskin, for example, sometimes called "the mother of authentic midwifery" helped open The Farm Midwifery Center in Summertown, Tennessee, in 1971, which is still in operation. However, although there was a steep increase in midwife-attended births between 1975 and 2002 (from less than 1.0% to 8.1%), most of these births occurred in the hospital. The US rate of out-of-hospital birth has remained steady at 1% of all births since 1989, with data from 2007 showing that 27.3% of the home births since 1989 took place in a free-standing birth center and 65.4% in a residence. Hence, the actual rate of home birth in the United States remained low (0.65%) over the twenty years prior to 2007.