One of my monthly tasks as Sales Analyst for Phonak is to monitor official market sales data within Europe. Changes to reimbursements and subsidies affect the number of hearing aids that are sold, as funding becomes more or less available to the end user. This has an impact on the trends that can be seen within the market data.
For example, a German court ruling stated that the hearing aid subsidies should rise by 76% to 740€ per hearing aid. No one could have predicted the dramatic effect it would have on the German market.