The only population that has increased on the plains is that of various Native American nations. Some of these have started to raise bison, in part for tourism and ecological value, as well as its primary place in their traditional cultures. In 1992 Native American tribes started the InterTribal Bison Cooperative. The consortium now includes 57 Native American governments in 19 states. It trains Indian buffalo producers and tribal land managers, and takes other steps to reinvigorate buffalo's historically central place in their cultures. The buffalo count on Indian land has at least tripled since 1992. As of 2009, the tribes collectively managed 15,000 bison. Non-profits and private owners have also been raising bison; by 2001, the number of bison on the Plains had increased to a total of 300,000.