18. Cash and cash equivalents

Cash and cash equivalents amounts to 386.6 million euros at 31 December 2018 (31 December 2017: 170.4 million euros), including deposits of 190 million euros with an original maturity of less than three months at balance sheet date (31 December 2017: 100 million euros). The average interest rate on the deposits reported under cash and cash equivalents as at 31 December 2018 is -0.36% (31 December 2017: -0.33%).

Cash deposits that have an original maturity longer than three months (265.0 million euros at 31 December 2018 compared to 190.0 million euros at 31 December 2017) are classified as part of note 17. Trade and other receivables.