| | 2016 | 2015 | 2014 | 2013 | 2012 |
Unit sales | | 15,171 | 14,572 | 13,509 | 11,528 | 9,903 |
Revenue | | £3,136.8m | £2,901.7m | £2,573.9m | £2,085.9m | £1,721.4m |
Average selling price | | £206,765 | £199,127 | £190,533 | £180,941 | £173,823 |
Profit from operations * | | £778.5m | £634.5m | £473.3m | £333.1m | £222.5m |
Profit before tax * | | £782.8m | £637.8m | £475.0m | £329.6m | £221.5m |
Basic earnings per share * | | 205.6p | 173.0p | 124.5p | 83.3p | 56.7p |
Diluted earnings per share * | | 199.5p | 169.1p | 124.3p | 82.8p | 56.2p |
Cash return/dividend per share | | 135.0p | 110.0p | 95.0p | 70.0p | 75.0p |
Net assets per share | | 887.3p | 800.7p | 715.4p | 671.4p | 658.2p |
Total shareholders' equity | | £2,737.4m | £2,455.8m | £2,192.6m | £2,045.5m | £1,993.7m |
Return on capital employed* | | 39.4% | 32.1% | 24.6% | 17.6% | 12.2% |
All figures stated before exceptional items and goodwill impairment where applicable.
*2012 restated for the effect of IAS 19 Employee Benefits (revised).