Due to classification, I did not realize it was that difficult to count Ebikes. Apparently electric bikes are still ~1% of total bicycle sales in the United States and it is difficult to determine the growth rate.
One estimate here from from eCycleElectric is that between 136,000 and 174,000 ebikes were sold in 2013, compared to 15 million regular human powered bicycle sold.
One estimate here from from eCycleElectric is that between 136,000 and 174,000 ebikes were sold in 2013, compared to 15 million regular human powered bicycle sold.