How much fuel saved using electric bikes worldwide since 2000?

There have been around 300,000 electric bikes worldwide in 2000 and It is said to be more than 200,000,000 electric bikes in 2015. Each electric bike is assumed to travel 10km/day for 100days a year. The average Km travelled by ebikes from 2000 to 2015 is calculated this way: 200,000,000 x 10km x 100days x 15/2 [...]