So wuchs etwa das reale BIP pro Kopf in den USA zwischen 1961 und 1986 um den Faktor 1,87 – d.h., es verdoppelte sich fast.
For example, US real per capita GDP grew by a factor of 1.87 – that is, nearly doubled in size – from 1961 to 1986, but by a factor of only 1.58 from 1978 to 2003.