YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 24-hr Avg.
1990 789 811 946 1030 1159 1247 1372 1361 1270 1168 975 815 1080
1991 929 940 914 1041 1185 1252 1424 1410 1311 1238 984 878 1127
1992 842 959 1061 1127 1329 1377 1529 1546 1412 1381 1144 947 1225
1993 902 1001 1076 1212 1434 1546 1696 1687 1572 1511 1147 1074 1324
1994 1056 1123 1226 1329 1539 1606 1754 1662 1481 1370 1040 926 1344
1995 949 1208 1227 1318 1576 1600 1775 1753 1678 1550 1288 1152 1423
1996 1004 829 1145 1293 1529 1748 1902 1798 1808 1807 1227 1115 1434
1997 1253 1388 1200 1381 1446 1599 1729 1726 1584 1591 1364 1168 1452
1998 1076 1207 1238 1432 1573 1644 1758 1773 1694 1568 1346 1226 1461
1999 1185 1214 1196 1380 1618 1690 1762 1724 1601 1564 1347 1190 1456
2000 1123 1238 1322 1436 1671 1715 1803 1818 1679 1664 1357 1204 1503
2001 1205 1250 1346 1444 1718 1815 1959 2062 1999 1732 1492 1219 1603
2002 1223 1323 1196 1511 1810 1767 1905 1953 1783 1716 1537 1314 1587
2003 1240 1298 1256 1512 1790 1843 2007 2014 1852 1833 1432 1330 1617
2004 1232 1420 1445 1711 1664 1801 1946 1909 1836 1730 1426 1331 1621
2005 1184 1374 1372 1505 1760 1819 2034 1928 1836 1659 1437 1279 1599
2006 1262 1407 1358 1525 1771 1867 1928 1942 1901 1706 1363 1258 1607
2007 1239 1277 1326 1567 1803 1852 2015 1971 1860 1653 1388 1167 1593
2008 1119 1192 1107 1218 1475 1498 1726