Worldwide, the pharmaceuticals market is anticipated to grow from more than USD 782 billion in 2011 to approach a value of just over USD 971 billion by the end of 2016, registering a CAGR of over 24%. In 2010 the average medicines expenditure per person within the UK was £271, and this is expected to increase with the ageing population. A significant and increasing proportion of these sales are protein-based biotherapeutics or biomolecules. Currently, these account for 19% of the total market, and are growing at twice the rate of traditional small molecule pharmaceuticals. It is predicted that close to 50% of the top 100 pharmaceutical products will be biomolecules by 2016. By far the largest segment of the biopharmaceutical market is the monoclonal antibody (MAb) with an estimated share of 25.6%, which corresponds to USD 51.1 billion.