Total passenger numbers for the 2011 financial year were 758,250.
Over the last year, passenger numbers have increased by about 5%.
Between 2003 and 2008 passenger numbers have increased by 530%.
At the same time, there has been a fall in passenger numbers.
Should passenger numbers continue to fall at the current rate, the tax is likely to be raised even higher.
Passenger numbers during 2011 were 15% lower compared to 2010.
Passenger numbers were high especially in the summer months as the line provided easy access to the country.
Passenger numbers dropped about 10 percent in the week the war began.
Passenger numbers reached a record high of 1.3 million, a 40% increase on 2002.
The passenger numbers rose to to 1.9 million that year from 905,000 in 1998.