Tokyo has the busiest subway system with nearly 2 billion passengers per year, with Paris and London slightly behind with 1.191 billion and 775 million passengers <br>respectively .
Tokyo has the busiest subway system, with nearly 2 billion passengers a year. Paris and London are slightly behind, with a few points of passengers<br>1.191 billion and 775 million respectively.
Tokyo has the busiest subway system, with nearly 2 billion passengers every year, while Paris and London are slightly behind, with different numbers of passengers. Don't be 1.191 billion and 775 million.