Index is rebased to 2011=100 on February 2012. Index is rebased to 2007=100 in March 2008. Please see SIIPO series for historical data for 2003=100. Index is rebased to 2003=100 in February 2004. Please see ALLX SMFG for historical data based at 1999=100. Figures are a measure of change, in real terms, of the monthly total production of manufacturing establishments compared to a base year period. The index excludes rubber processing. The classification of establishments are according to the Singapore Standard Industrial Classification 1996. Latest index rebase: 2007 = 100 History is stored independently for monthly and quarterly frequencies. HP values for these frequencies may not match each other. Note that when only one frequency is stored in history, for the other frequencies, history is derived from that of the stored frequency. For example, HP W, HP M, HP Q and HP Y will derive data from HP D when only daily history is stored, HP Q and HP Y will derive data from HP M when only monthly history is stored. As another example, if both daily and monthly are stored, HP W will derive data from HP D, while HP Q and HP Y will derive data from HP M and so on.