Wayne.Kerr
Vital Champions League
But you would take out exceptional items in order not to skew figures year on year just as they do when marking ice skating - they exclude the highest and lowest marksstatistics will always cause problems, the 5 year average death rate is a good example. If this year ended with 60,000 deaths above the 5 year average, that would skew the figures for the next 5 years. next year could have 10,000 deaths above the current average, but because the new average will have increased by 12,000 the figure would show as below average.
sorry if that sounds a little garbled, but it does show how no statistics can be taken on face value, they are one of many tools.