The Netherlands has a national, government legislated minimum wage, which is usually adjusted twice a year, on 1 January and 1 July. Depending on the payment period of the firm or the industry, the minimum wage is defined on a monthly, weekly or daily basis. In 2017, 47% of the employees had a 36-hour working week, 9% had a 37-hour working week, 31% had a 38-hour working week and 13% had a 40-hour working week (Ministerie van Sociale Zaken en Werkgelegenheid 2018). Because of the specification of the minimum wage, the hourly rate varies substantially between workers depending on their usual working hours. As of 1 July 2018, the gross minimum wage for full-time workers aged 22 and older is 367.90 euros per week. For workers with a 36-hour working week, this implies an hourly minimum wage of 10.22 euros, while for workers with a 40-hour working week it is 9.19 euros per hour, a difference of 1 euro per hour. Like many European countries with a minimum wage, the Netherlands has a separate minimum wage for young workers, in the Dutch case this applies to workers who are 15 to 21 years old. Youth minimum wages are defined as a percentage of the adult minimum wage. For 15-year-olds, this wage is currently 30%, which implies that the hourly minimum wage for a 15-year-old worker in an industry with a usual working week of 40 hours is 2.76 euros.