Note: The following is assuming in the HTML form, the name of the state drop down menu is state and the checkbox's names are yr1999, yr2000, yr2001; the three tables are also named yr999, yr2000, yr2001.
if ($yr1999) {
$sql = "SELECT * FROM yr1999 WHERE State='$state' LIMIT 1";
$result = mysql_query($sql);
$myrow = mysql_fetch_array($result);
$infofor1999 = $myrow['State'];
}
and then repeat it for each year then take $infofor<year> and display it in a normal HTML table
if this isn't what you meant, please tell me in more detail what you mean