A529remain at year 2013 level, and these were then combined with official population forecasts. Results: Altogether 160,952 individuals (81% of all inhabitants) had at least one healthcare contact during the follow up. Primary and secondary healthcare services had been used by 155,631 and 59,589 patients, respectively. The average annual cost per patient was 1,853€ . The average cost in primary and secondary healthcare was 808€ and 2,895€ , respectively. Variation was wide across the different ages (Primary healthcare, range: 346€ -5,645€ ; Secondary healthcare, range: 1,282€ -4,474€ ). Due to aging of the population only, according to the future projections, in the year 2025, the total primary healthcare costs are 21% and secondary healthcare costs 14% higher than in 2013. ConClusions: With respect to costs, aging of the population affects primary healthcare more than specialized healthcare. Thus, the healthcare utilization should be regarded as one entity taking into account both primary and secondary healthcare services. If the overall treatment process, from primary care to secondary care and sometimes back to primary care, is not taken in to account, this will lead to suboptimal decision making.