Australia has maintained the highest amount of tracks, with strong increases in 2001, 2007 and 2008.
The laws of United States have changed the least between 1999 and 2008.
Switzerland has among the more complex entry policy structures, with a strong increase in 2002.
The Netherlands, Spain and Luxembourg have maintained the least complex systems of immigrant entry.
The United Kingdom features an average amount of entry tracks, steadily increasing over the years.
Germany’s increase in immigration tracks in 2007 makes it one of the more complex systems.