Question: when was the international classification of diseases first adopted by the united states
[{'answer': '1968', 'provenance': [{'wikipedia_id': '15459', 'title': 'International Statistical Classification of Diseases and Related Health Problems', 'start_paragraph_id': 9, 'start_character': 786, 'end_paragraph_id': 9, 'end_character': 790, 'bleu_score': 1.0, 'section': 'Section::::Historical synopsis.\n'}]}, {'provenance': [{'wikipedia_id': '15459', 'title': 'International Statistical Classification of Diseases and Related Health Problems', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 783, 'bleu_score': 0.500733828074416, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15191240291191061544}, 'section': 'Section::::Versions of ICD.:ICD-8a.\n'}]}]