preliminary half year report announcement six months ended 31 december 2006 directors comments overview auckland international airport limited aial continued to deliver solid growth in revenue and earnings before interest tax depreciation ebitda the first of 2007 financial there also was good progress on upgrading expanding facilities meet increasing demand service standards total for 159 679 million an increase 7 0 per cent over same period last operating costs increased by 4 1 33 458 8 126 221 surplus after 51 113 this a pleasing result given associated with company s investment programme passenger volumes were 6 above despite numbers two being lower than primarily due positive impact lions tour new zealand july august 2005 following initial month