Case Expression in Report Studio

Based on a reporting requirement I was asked to present data grouped in year range categories, (e.g. <2000, 2000-2005, 2006-2009, >2009...). The "search case" expression met my objective.

The syntax looks something like this:

case
WHEN [year] < 2000 THEN ("category 1")
WHEN [year] < 2006 THEN ("category 2")
WHEN [year] < 2009 THEN ("category 3")
WHEN [year] > 2009 THEN ("category 4")
...
end

Notice that within the case expression I started with the lessor value (2000) and followed up to the top value. I could have also used an IF ... THEN statement but my feeling is that is it would look quite cluttered.