The source I provided shows that the growth rate has been consistently dropping. In 2015,2016,2017,2018 it was 1.19,1.14,1.12,1.10
Not sure you can extrapolate out 100 (or 66) years when there's been a 0.11% (1.19 -> 1.08) change in the growth rate in just the last 5 years.