| Ano | JAN | FEV | MAR | ABR | MAI | JUN | JUL | AGO | SET | OUT | NOV | DEZ |
| 2010 | 0,5 | 0,5 | 0,5000 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 |
| 2009 | 0,6849 | 0,5453 | 0,6445 | 0,5456 | 0,5451 | 0,5659 | 0,6056 | 0,5198 | 0,5 | 0,5000 | 0,5 | 0,5 |
| 2008 | 0,6015 | 0,5244 | 0,5411 | 0,596 | 0,574 | 0,6152 | 0,6924 | 0,6582 | 0,698 | 0,7519 | 0,6626 | 0,716 |
| 2007 | 0,72 | 0,5725 | 0,6885 | 0,6278 | 0,6697 | 0,5959 | 0,6476 | 0,6473 | 0,5354 | 0,6148 | 0,5593 | 0,5643 |
| 2006 | 0,7338 | 0,5729 | 0,7083 | 0,5859 | 0,6897 | 0,6947 | 0,676 | 0,7448 | 0,6529 | 0,6884 | 0,6288 | 0,653 |
| 2005 | 0,6889 | 0,5967 | 0,7648 | 0,7013 | 0,754 | 0,8008 | 0,7588 | 0,8483 | 0,765 | 0,7111 | 0,6939 | 0,728 |
| 2004 | 0,6286 | 0,546 | 0,6787 | 0,5878 | 0,6554 | 0,677 | 0,6962 | 0,7015 | 0,6737 | 0,6114 | 0,6152 | 0,7412 |
| 2003 | 0,9902 | 0,9137 | 0,8801 | 0,9205 | 0,9673 | 0,9187 | 1,0492 | 0,9058 | 0,8381 | 0,8229 | 0,6785 | 0,6908 |
| 2002 | 0,7604 | 0,6177 | 0,6767 | 0,7369 | 0,7113 | 0,659 | 0,7669 | 0,7493 | 0,6965 | 0,7782 | 0,7657 | 0,8627 |
| 2001 | 0,6376 | 0,537 | 0,6733 | 0,6554 | 0,6836 | 0,6465 | 0,7453 | 0,8453 | 0,6635 | 0,7928 | 0,6938 | 0,6993 |
| 2000 | 0,716 | 0,734 | 0,7253 | 0,6308 | 0,7504 | 0,7151 | 0,6555 | 0,7035 | 0,6043 | 0,6323 | 0,6203 | 0,5996 |
| 1999 | 1,0189 | 1,3339 | 1,6672 | 1,1122 | 1,079 | 0,8124 | 0,7948 | 0,796 | 0,7729 | 0,7276 | 0,7008 | 0,8013 |
| 1998 | 1,6516 | 0,9483 | 1,404 | 0,9744 | 0,9566 | 0,9938 | 1,0531 | 0,8768 | 0,9535 | 1,3936 | 1,1167 | 1,2471 |
| 1997 | 1,25 | 1,16 | 1,13 | 1,12 | 1,14 | 1,16 | 1,1613 | 1,1301 | 1,1506 | 1,1586 | 2,0411 | 1,815 |
| 1996 | 1,76 | 1,47 | 1,32 | 1,16 | 1,09 | 1,11 | 1,09 | 1,13 | 1,17 | 1,25 | 1,32 | 1,38 |
| 1995 | 2,6621 | 2,3623 | 2,81 | 3,98 | 3,76 | 3,4 | 3,51 | 3,12 | 2,45 | 2,16 | 1,95 | 1,85 |
| 1994 | 42,1472 | 40,5593 | 42,5592 | 46,6998 | 47,1722 | 47,6097 | 5,5513 | 2,6418 | 2,9512 | 3,0678 | 3,4356 | 3,3874 |
| 1993 | 27,3938 | 27,032 | 26,439 | 28,8611 | 29,3234 | 30,7304 | 31,0218 | 34,0067 | 35,2931 | 37,2126 | 36,8408 | 37,484 |
| 1992 | 26,1074 | 26,238 | 24,8913 | 21,6854 | 20,409 | 21,6552 | 24,3084 | 23,8361 | 26,0069 | 25,6953 | 23,9064 | 24,5697 |
| 1991 | 20,811 | 7,535 | 9,0425 | 9,4746 | 9,5349 | 9,947 | 10,6002 | 12,5027 | 17,3639 | 20,3688 | 31,1726 | 29,0621 |
| 1990 | 56,8905 | 73,6439 | 85,2416 | 0,5 | 5,9069 | 10,158 | 11,3439 | 11,1329 | 13,4142 | 14,2785 | 17,2232 | 19,9869 |
| 1989 | 22,9708 | 18,9456 | 20,4139 | 11,5182 | 10,4895 | 25,4541 | 29,4038 | 29,9867 | 36,6297 | 38,3081 | 42,1271 | 54,3177 |
| 1988 | 17,0929 | 18,5503 | 16,5899 | 19,876 | 18,369 | 20,1273 | 24,6601 | 21,2634 | 24,6297 | 27,8862 | 27,5545 | 29,4339 |
| 1987 | 17,4041 | 20,2054 | 15,0877 | 21,5648 | 24,0606 | 18,6106 | 8,9065 | 8,0861 | 7,9864 | 9,726 | 13,4049 | 14,7103 |
| 1986 | 16,8111 | 14,3823 | 1,19 | 1,19 | 1,19 | 1,88 | 1,88 | 1,88 | 2,81 | 2,81 | 2,81 | 7,8063 |
| 1985 | 13,163 | 10,751 | 13,263 | 12,388 | 10,5559 | 9,7542 | 8,1521 | 8,7206 | 9,6455 | 9,545 | 11,6756 | 13,9268 |
| 1984 | 10,349 | 12,861 | 10,55 | 9,444 | 9,444 | 9,746 | 10,851 | 11,153 | 11,052 | 13,163 | 10,449 | 11,052 |
| 1983 | 7,75 | 7,75 | 7,75 | 8,79 | 8,79 | 8,79 | 9,543 | 9,041 | 10,047 | 10,248 | 8,942 | 8,138 |
| 1982 | 5,51 | 5,51 | 5,51 | 6,01 | 6,61 | 6,01 | 7,18 | 7,18 | 7,18 | 7,19 | 7,19 | 7,19 |
| 1981 | 6,45 | 6,45 | 6,45 | 6,52 | 6,52 | 6,52 | 6,35 | 6,35 | 6,35 | 5,98 | 5,98 | 5,98 |
| 1980 | 4,37 | 4,37 | 4,37 | 3,94 | 3,94 | 3,94 | 3,64 | 3,64 | 3,64 | 4,13 | 41,13 | 4,13 |
| 1979 | 2,86 | 2,86 | 2,86 | 4,14 | 4,14 | 4,14 | 3,71 | 3,71 | 3,71 | 4,9 | 4,9 | 4,9 |
| 1978 | 2,83 | 2,83 | 2,83 | 3,49 | 3,49 | 3,49 | 3,32 | 3,32 | 3,32 | 3,02 | 3,02 | 3,02 |
| 1977 | 2,49 | 2,49 | 2,49 | 3,65 | 3,65 | 3,65 | 2,54 | 2,54 | 2,54 | 2,11 | 2,11 | 2,11 |
| 1976 | 2,67 | 2,67 | 2,67 | 3,32 | 3,32 | 3,32 | 3,38 | 3,38 | 3,38 | 3,45 | 3,45 | 3,45 |
| 1975 | 2,18 | 2,18 | 2,18 | 2,54 | 2,54 | 2,54 | 2,26 | 2,26 | 2,26 | 2,48 | 2,48 | 2,48 |
| 1974 | 1,76 | 1,76 | 1,76 | 2,86 | 2,86 | 2,86 | 4,51 | 4,51 | 4,51 | 2,06 | 2,06 | 2,06 |
| 1973 | 1,57 | 1,57 | 1,57 | 1,67 | 1,67 | 1,67 | 1,39 | 1,39 | 1,39 | 1,66 | 1,66 | 1,66 |
| 1972 | 1,72 | 1,72 | 1,72 | 2,04 | 2,04 | 2,04 | 1,49 | 1,49 | 1,49 | 1,41 | 1,41 | 1,41 |
| 1971 | 1,88 | 1,88 | 1,88 | 2,02 | 2,02 | 2,02 | 2,59 | 2,59 | 2,59 | 2,12 | 2,12 | 2,12 |
| 1970 | 2,29 | 2,29 | 2,29 | 1,62 | 1,6200 | 1,62 | 1,5 | 1,5 | 1,5 | 2,49 | 2,49 | 2,49 |
| 1969 | 2,16 | 2,16 | 2,16 | 1,87 | 1,87 | 1,87 | 1,27 | 1,27 | 1,27 | 2,49 | 2,49 | 2,49 |
| 1968 | 2,05 | 2,05 | 2,96 | 2,96 | 2,96 | 2,96 | 2,32 | 2,32 | 2,32 | 2,18 | 2,18 | 2,18 |
| 1967 | 2,48 | 2,48 | 2,48 | 2,54 | 2,54 | 2,54 | 2 | 2 | 2 | 1,81 | 1,81 | 1,81 |
| 1966 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 0,00 | 2,94 | 2,94 | 2,94 |