| Ano | Casos confirmados (Todas as Formas) | Incidência |
|---|---|---|
| 1986 | 1724 | 110.5 |
| 1987 | 711 | 44.4 |
| 1988 | 77 | 4.7 |
| 1989 | 744 | 44.2 |
| 1990 | 4942 | 286.8 |
| 1991 | 3026 | 171.1 |
| 1992 | 831 | 46.1 |
| 1993 | 7 | 0.4 |
| 1994 | 28317 | 1513.9 |
| 1995 | 6 | 0.3 |
| 1996 | 30 | 1.5 |
| 1997 | 511 | 25.4 |
| 1998 | 1176 | 57.2 |
| 1999 | 7000 | 333.7 |
| 2000 | 9510 | 444.1 |
| 2001 | 13620 | 623.7 |
| 2002 | 4947 | 222.9 |
| 2003 | 10217 | 452.8 |
| 2004 | 584 | 25.5 |
| 2005 | 11776 | 495.8 |
| 2006 | 15975 | 661.0 |
| 2007 | 10400 | 423.0 |
| 2008 | 31551 | 1275.5 |
| 2009 | 3436 | 137.1 |
| 2010 | 3935 | 160.5 |
| 2011 | 34502 | 1393.1 |
| 2012 | 39052 | 1562.0 |
| 2013 | 8843 | 346.5 |
| 2014 | 5149 | 200.2 |
| 2015 | 26816 | 1034.9 |
| 2016 | 21853 | 837.4 |
| 2017 | 13561 | 516.1 |
| 2018 | 1425 | 53.9 |
| 2019 | 3896 | 146.0 |
| 2020 | 3395 | 128.4 |