 In 2014, Jamu contributes Rp 3 trillion (US$73.29 million) to overall sales.Despite jamu's popularity throughout Indonesia, it seems that jamu culture is most prevalent in Java.The jamu herbal culture is prevailing in Javanese royal courts of Yogyakarta and Surakarta; where the ancient books on herbal medicine is kept in royal library, and jamu medicine is prescribes to royalties and nobles in Javanese "keratons".