diff --git a/booking.reports.inc b/booking.reports.inc
index 1844f31..17e123d 100644
--- a/booking.reports.inc
+++ b/booking.reports.inc
@@ -372,6 +372,9 @@ function booking_csv_report() {
 		if (in_array($key, $fields_to_skip))
 			continue;		
 		$header_array[] = $key;
+		//add in a special column for a processed version of the date of birth
+		if (strcmp($key,"booking_dob") == 0)
+			$header_array[] = "booking_dob_processed";
 	}
 			
 	$header = implode( $delimiter, $header_array );
@@ -396,10 +399,15 @@ function booking_csv_report() {
 			}
 			
 			//handle dates
-			if ($key == 'booking_dob' || $key == 'booking_passport_expiry_date') {
+			if ($key == 'booking_dob') {
 				$output[] = format_date($value, 'custom', 'd/m/Y');
+				$output[] = '"' . _booking_avg_age($value, 1, $event->booking_event_start) . '"';
 				continue;
 			}
+			if ($key == 'booking_passport_expiry_date') {
+				$output[] = format_date($value, 'custom', 'd/m/Y');
+				continue;
+			}			
 			
 			//handle more exact dates
 			if ($key == 'booking_timestamp') {