What is the highest number where the portion of observers is 0.163%?
{'header': ['Region', 'Total Population', 'Hindus', '% of Hindus', '% of Hindu total'], 'page_title': 'Hinduism by country', 'page_id': '', 'types': ['text', 'real', 'real', 'text', 'text'], 'id': '1-1389609-3', 'section_title': 'By region', 'caption': 'Hinduism \n in \n Asia', 'rows': [['Central Asia', '92019166', '149644', '0.163%', '0.016%'], ['East Asia', '1527960261', '130631', '0.009%', '0.014%'], ['Middle East', '274775527', '792872', '0.289%', '0.084%'], ['South Asia', '1437326682', '1006888651', '70.05%', '98.475%'], ['Southeast Asia', '571337070', '6386614', '1.118%', '0.677%']], 'name': 'table_1389609_3'}