All Figures can be revised by the source. Base: Average 1995=100 REAL GDP CHANGE RATE IS BASED ON THE REAL GDP INDEX (BZGDINDX Index ). This is calculated comparing the average of the last 4 Q against the average of the other 4 preceding Q. History is stored independently for quarterly and yearly 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.