Answer:
been more rapid since the mid-nineteenth century than before.
Step-by-step explanation:
One of the benefits resulting from the second industrial revolution (around 1870) and more specifically from mass production and electricity, is that it helped to increase the growth rate of real GDP per capita in almost all the world. Growth rate of the real GDP per capita has been steadily increasing during the last 150 years.
Of course there are bumps (recessions and wars) in the middle that alter the growth rate of different countries, but in general terms it has recovered swiftly in most places.