Five hundred and four hospitals including 4,762 units provided AHC data for 2008, and 791 hospitals with 9,256 units transmitted AHC data for 2012. One hundred seventy-seven hospitals, 140 ICUs and 165 normal wards within these hospitals continuously provided surveillance data over a 5 year period. In 2008, the median AHC in the ICUs was 72 ml/PD (IQR, 58 ml/PD - 93 ml/PD), and in 2012 the result was 97 ml/PD (IQR, 77 ml/PD - 124 ml/PD). The median AHC was 18 ml/PD (IQR, 15 ml/PD - 25 ml/PD) in 2008 and 27 ml/PD (IQR, 23 ml/PD - 36 ml/PD) in 2012. In 2008 the median AHC on normal wards was 16 ml/PD (IQR, 13 ml/PD - 18 ml/PD) and in 2012 the median AHC was 24 ml/PD (IQR 19 ml/PD - 28 ml/PD). There was an increase of 46% in AHC within the group of analyzed hospitals. On the analyzed ICUs AHC increased by 36% and on normal wards by 48%.