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From 1993 to October 1997 , this city 's contracts utilized foreign capital totally reached 4.88 billion US dollars , and actually realized 1.91 billion US dollars , equivalent to 90 % of the total of 18 years of reform and opening up .
 1993 to October 1997, 4.88 billion US dollars, 1.91 billion US dollars, 90 %, 18 years
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 1993 to October 1997, 4.88 billion US dollars, 1.91 billion US dollars, 90 %, 18 years