This graphic is interesting, thought it might be instructive to calculate accumulated values:

  For the median (50% percentile): 1.005**36 = 1.2
  P99: 1.022**36 = 2.2
  P99.9: 1.032**36 = 3.1
  P99.99: 1.043**36 = 4.6
  P99.999: 1.06**36 = 8.1

It would be interesting to see absolute numbers. I remember vaguely that the productivty increased by a factor 8 since the eighties...