the number of train passangers travelling in Sydney

The graph depicts the number of passengers traveling by train in Sydney from 1994 to 2004.
In general there was sharp increase about three hundred million in 2001.
According to the figures ,there was a slight increase from 1995 to 1996.Then it had a gradual fluctuation from 1996 to 1999.After 1999 to 2000 there were a considerab rise which passengers population reach nearby 280 million.The sharp growth occur after 2000 to 2001 in which hits the highest point 2001 with 300 milion traveler. This significant surge recovers pervious rate alike 2000 in 2002.From 2002 to 2004 it remains stable with 280 million passenger.