|  | 1 | Low (The indigenous language remained the sole or primary means of communication for most of the indigenous population for the duration of the post-contact period.) | 27 | 
                    
                        |  | 2 | Medium (The indigenous language remained an important means of communication for the duration of the post-contact period, but at one time or another the indigenous population used a non-indigenous language to roughly the same extent.) | 54 | 
                    
                        |  | 3 | High (At one time or another during the post-contact period, a foreign language became the sole or primary means of communication for most of the indigenous population.) | 15 |