| Positive IOD | Period 1 | 1977, 1982, 1991, 1994, 1997, 2006 |
| Period 2 | 2015, 2018, 2019 | |
| Negative IOD | Period 1 | 1979, 1981, 1984, 1988, 1989, 1990, 1992, 1993, 1995, 1996, 1998, 1999, 2001, 2005, 2010 |
| Period 2 | 2016, 2021, 2022 |