66 appendix 1 data sources national apparent consumption of foodstuffs and nutrients are a measure the food supply available for human after allowing other uses losses these not direct intake is estimated through calculating total production imports including commercial home opening stocks subtracting exports usage processed foods non use wastage closing as result which same consumed because calculated values averages per capita availability population whole they give no information on individuals or groups within however useful highlighting trends changes in most recent australian than alcohol 1998 99 1997 98 further details see abs 2000 aihw field et al 2003 average 3 years ended
