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Chart 2 was plotted using annual data, rather than quarterly data. It shows that the annual consumption of paroxetine in all its forms grew by more than 1.15 million units per year for 7 years up to 2001, then it fell by 2.7 M units i.e. 25% from 2001 to 2003. In fact this decline is much worse if the higher precision quarterly data is used; from the peak at Q4 2001 to Q4 2003 the fall was 36%. Annual totals can disguise higher rates of change defined by the quarters within the years (frequently exploited in financial marketing.)
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