For the second year in a row, the University of Wisconsin–Madison was ranked 19th among world universities in an annual survey done by Shanghai’s Jiao Tong University.

UW-Madison is one of only six American public universities to place in the top 20 and the highest in the Big Ten. The University of Michigan ranked 22nd.

Rankings are based upon alumni and staff winning Nobel Prizes and Fields Medals, research performance, highly cited researchers and papers published in Nature and Science, articles indexed in Thomson Reuters’ Science Citation Index Expanded and Social Sciences Citation Index and per capita performance based on the size of an institution.

The top 10 universities remain the same as last year in the Academic Ranking of World Universities with Harvard University ranked first followed by Stanford University, the Massachusetts Institute of Technology, the University of California at Berkeley and the University of Cambridge.

United States institutions dominate the rankings with 17 of the top 20 universities and 53 of the top 100.

Here is a look at the top 20 institutions from the survey: