 The state managed trade with the outside world, and decided a production schedule for the instrument makers at the start of each year, rendering it a useful foreign-exchange income.In 1994 Wohlhausen and Breitenfeld were subsumed into Markneukirchen (on January and 1 March, respectively), and Landwüst joined in 1999.Erlbach became part of Markneukirchen in 2014.