Note you can achieve the same by calling the ecb_data() function with the right
parameters for each currency.
The reference rates are usually updated at around 16:00 CET every working day, except on TARGET closing days.
They are based on the daily concertation procedure between central banks across
Europe, which normally takes place around 14:10 CET. The reference rates are
published for information purposes only.
Using the rates for transaction purposes is strongly discouraged.