Station traffic for trainspotters

From Transport for London, we learn that in 2008 on average 4,424 people entered Kensal Green underground station on a weekday, but only 3,878 left. On a saturday numbers were lower but the discrepancy was higher, with 3,086 entering but only 2,652 leaving, while on Sunday 2,075 entered and 1,858 left. This meant a total of 2.6m entries and exits during the year. In 2007 the weekday entrance was 4,111 and exit 3,428, back in 2003 just 3,187 and 2,771.

Queen's Park was busier, with 5.7m in 2009, up from 4.3m in 2003, and an average daily entrance/exit of about 10,000/9,000. Again more leave than arrive, which I assume relates to people getting more taxis or perhaps buses in the evening.