个人所得税免征额是多少？
个人所得税免征额共调整过两次。[{'character': '个', 'pinyin': 'ge4', 'highest pitch': 11.57, 'lowest pitch': 10.18, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 10.18, 'lowest pitch': 8.69, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '所', 'pinyin': 'suo3', 'highest pitch': 8.77, 'lowest pitch': 5.74, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '得', 'pinyin': 'de2', 'highest pitch': 6.54, 'lowest pitch': 5.55, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '税', 'pinyin': 'shuei4', 'highest pitch': 8.89, 'lowest pitch': 6.65, 'duration': 0.22, 'prosody hierarchy': '#2'}, {'character': '免', 'pinyin': 'mian3', 'highest pitch': 6.65, 'lowest pitch': 4.49, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '征', 'pinyin': 'zheng1', 'highest pitch': 10.07, 'lowest pitch': 5.15, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '额', 'pinyin': 'e2', 'highest pitch': 9.59, 'lowest pitch': 6.34, 'duration': 0.3, 'prosody hierarchy': '#2'}, {'character': '共', 'pinyin': 'gong4', 'highest pitch': 8.66, 'lowest pitch': 6.64, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '调', 'pinyin': 'tiao2', 'highest pitch': 7.52, 'lowest pitch': 6.29, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '整', 'pinyin': 'zheng3', 'highest pitch': 8.33, 'lowest pitch': 5.87, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '过', 'pinyin': 'guo4', 'highest pitch': 7.94, 'lowest pitch': 6.42, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '两', 'pinyin': 'liang3', 'highest pitch': 7.02, 'lowest pitch': 5.86, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '次', 'pinyin': 'cii4', 'highest pitch': 9.89, 'lowest pitch': 8.43, 'duration': 0.29, 'prosody hierarchy': '#4'}]