Every year now huh?
2018 (President Donald Trump): January 20 to January 23 - 3 days
2018 (President Donald Trump): February 9 – 1 day.
2013 (President Barack Obama): October 1 to October. 17 - 16 days
1995-1996 (President Bill Clinton): December 16, 1995, to January 6, 1996, - 21 days
1995 (President Bill Clinton): Nov. 14 to 19 - 5 days
1990 (President George H.W. Bush): October 5 to 9 - 3 days
1987 (President Ronald Reagan): December 18 to December 20 - 1 day
1986 (President Ronald Reagan): October 16 to October 18 - 1 day
1984 (President Ronald Reagan): October 3 to October 5 - 1 day
1984 (President Ronald Reagan): September 30 to October 3 - 2 days
1983 (President Ronald Reagan): November 10 to November 14 - 3 days
1982 (President Ronald Reagan): December 17 to December 21 - 3 days
1982 (President Ronald Reagan): September 30 to October 2 - 1 day
1981 (President Ronald Reagan): November 20 to November 23 - 2 days
1979 (President Jimmy Carter): September 30 to October 12 - 11 days
1978 (President Jimmy Carter): September 30 to October 18 18 days
1977 (President Jimmy Carter): November 30 to December 9 - 8 days
1977 (President Jimmy Carter): October 31 to November 9 - 8 days
1977 (President Jimmy Carter): September 30 to October 13 - 12 days
1976 (President Gerald Ford): September 30 to October 11 - 10 days
It may have continued from 2001 onward, but September 11 caused massive realignment in political strategy for years; anyone seen as causing the government's basic functions to stumble while terrorists threatened America would have suffered a colossal political black-eye.
I couldn't guess off the top of my head why 2013 became the year Congressional leadership decided this was a game worth playing again.
On top of that, Republicans controlled the House and Senate for almost the entire period from 1997 to 2013. There wasn't a split congress.
The next shutdown to occur was a show of Republican chest beating in protest of ACA funding.
https://en.wikipedia.org/wiki/Government_shutdowns_in_the_Un...
All US funding gaps:
https://en.wikipedia.org/wiki/List_of_United_States_federal_...
(this is not in contradiction of the parent poster—just providing convenient further-reading links for others)