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However , in the past three years , Mexico 's foreign trade surplus showed a substantial degradation : 7.889 billion US dollars in 1995 , 6.424 billion US dollars in 1996 , and only 582 million US dollars last year .
 date: the past three years; geographical social political: Mexico; money: 7.889 billion US dollars; date: 1995; money: 6.424 billion US dollars; date: 1996; money: only 582 million US dollars; date: last year
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 date: the past three years; geographical social political: Mexico; money: 7.889 billion US dollars; date: 1995; money: 6.424 billion US dollars; date: 1996; money: only 582 million US dollars; date: last year