In the system of common law, each judicial decision becomes part of the body of law used in future decisions. However, some courts reserve certain decisions, leaving them "unpublished", and thus not available for citation in future cases. It has been argued that non-publication helps stem the problem of too much written material creating too little new law. Specifically, the number of federal appeals filed annually grew from 23,200 to 33,360 between 1980 and 1985, and 55,000 federal appeals were filed in 2000. Conversely, studies have shown how non-publication can distort the law.