Combination programs granting a bachelor's degree and medical degree are relatively rare in the US. Baccalaureate-MD programs opened for the first time in 1961 at Northwestern University Medical School and Boston University School of Medicine. By the 1990s, 34 programs had opened, and in 2011, these programs were offered at 57 medical schools. Several of these schools offer programs in combination with more than one undergraduate institution, for a total of 81 programs. In all current combination programs admitting graduating high school students to receive both a bachelors and a medical degree, the medical education portion is four years in length. 80% of the programs are 8 years in length, giving no time advantage to students over the standard process, but 21% offer a compressed 6- or 7-year program. This is different to the programs of the 1990s, where 42% of programs were 8 years, 32% were 7 years, and 23% were 6 years.