As with any statistics, it's important to understand the full picture. Just to add some more clarity:
2017-2018: 18 conference games + TBD conference tourney games (69%, TBD% including tourney)
2013-2014: 18 + 1 (61%, 58%)
1998-1999: 16 + 2 (63%, 61%)
1997-1998: 16 + 2 (63%, 61%)
1992-1993: 14 + 1 (57%, 53%)
1990-1991: 14 + 3 (64%, 65%)
1985-1986: 14 + 2 (57%, 56%)