This sequence represents...
...the number of years (hence the time tag) served in each 'electoral term' by the Leader(s) of the Central Committee of the Chinese Communist Party.
The terms represent:
1 = Chen Duxiu (1921-22)
1 = Chen Duxiu (1922-23)
2 = Chen Duxiu (1923-25)
2 = Chen Duxiu (1925-27)
1 = Xiang Zhongfa (1927-28)
17 = Bo Gu/Zhang Wentian/Mao Zedong (1928-45)
11 = Mao Zedong (1945-56)
13 = Mao Zedong (1956-69)
4 = Mao Zedong (1969-73)
4 = Mao Zedong (1973-77)
5 = Hua Guofeng/Hu Yaobang (1977-82)
5 = Hu Yaobang/Zhao Ziyang (1982-87)
5 = Zhao Ziyang/Jiang Zemin (1987-92)
5 = Jiang Zemin (1992-97)
5 = Jiang Zemin (1997-2002)
5 = Hu Jintao (2002-07)
5 = Hu Jintao (2007-12)
5 = Xi Jinping (2012-17)
5 = Xi Jinping (2017-22)
The next term in the sequence is not yet known, because...
...Xi Jinping's current term as leader began in 2022 but is not yet completed.