The driving factors are insecure, low income, poor career prospects, and meagre chances of returning to full-time work. And Germany lags far behind, with women occupying only 6.1% of seats on the boards of directors in Foibes Global 500 companies in 2013, compared to the OECD-wide average of 18%. Since January 2016, women must account for 30% of seats in the supervisor)' (non-executive) boardrooms of stock-listed and so-called "co-determined” companies, large companies of 2 000 or more workers, where employees appoint half the members of the supervisory board. About 200 companies are affected by the requirement.