The states with the highest percentage of professing Catholics are central states, namely Guanajuato (96.4%), Aguascalientes (95.6%) and Jalisco (95.4%), whereas southeastern states have the lowest percentage of Catholics, namely Chiapas (63.8%), Tabasco (70.4%) and Campeche (71.3%). The percentage of professing Catholics has been on the decrease over the last four decades, from over 98% in 1950 to 87.9% in 2000. The average annual growth of Catholic believers from 1990 to 2000 was 1.7% whereas that of non-Catholics was 3.7%. Given that the average annual population increase over the same time period was 1.8%, the percentage of Catholics in relation to the total population continues to be in overall decline.