 In 2017  there were 350,000 users of shared scooters worldwide and by 2019, this number had increased to 5  000,000.
<fluency>  In 2017  there were 350,000 users of shared scooters worldwide and by 2019, this number had increased to 5  000,000.
 In 2017 , there were 350,000 users of shared scooters worldwide and by 2019, this number had increased to 5 000,000.