for ($intYear = 1970; $intYear <= 2020; $intYear++) {
        $intTimestampLabel = mktime(0,0,0, $intSelectedMonth, 1, $intYear);
        $strLabel = date("Y", $intTimestampLabel);
        $strSelected = ($intYear == $intSelectedYear) ? 'selected="selected"' : '';
        printf('<option value="%s" %s>%s</option>', $intTimestampLabel, $strSelected, $strLabel);