01 — (January 1, 1979 through September 30, 1979)
02 — (October 1, 1979 through March 31, 1980)
03 — (April 1, 1980 through July 31, 1980)
04 — (August 1, 1980 through December 31, 1980)
05 — (January 1, 1981 through May 31, 1981)
06 — (June 1, 1981 through September 30, 1981)
07 — (October 1, 1981 through January 31, 1982)
08 — (February 1, 1982 through May 31, 1982)
09 — (June 1, 1982 through August 31, 1982)
10 — (September 1, 1982 through December 31, 1982)
11 — (January 1, 1983 through March 31, 1983)
12 — (April 1, 1983 through August 31, 1983)
13 — (September 1, 1983 through January 31, 1984)
14 — (February 1, 1984 through May 31, 1984)
15 — (June 1, 1984 through August 31, 1984)
16 — (September 1, 1984 through December 31, 1984)
17 — (January 1, 1985 through May 13, 1985)
18 — (May 14, 1985 through June 30, 1985)
19 — (July 1, 1985 through August 31, 1985)
20 — (September 1, 1985 through December 31, 1985)
21 — (January 1, 1986 through May 31, 1986)
22 — (June 1, 1986 through July 31, 1986)
23 — (August 1, 1986 through October 31, 1986)
24 — (November 1, 1986 through December 31, 1986)
25 — (January 1, 1987 through February 28, 1987)
26 — (March 1, 1987 through April 30, 1987)
27 — (May 1, 1987 through June 30, 1987)
28 — (July 1, 1987 through September 24, 1987)
29 — (September 25, 1987 through November 9, 1987)
30 — (November 10, 1987 through January 31, 1988)
31 — (February 1, 1988 through April 30, 1988)
32 — (May 1, 1988 through September 30, 1988)
33 — (October 1, 1988 through August 31, 1989)
34 — (September 1, 1989 through February 28, 1990)
35 — (March 1, 1990 through May 31, 1990)
36 — (June 1, 1990 through August 31, 1990)
37 — (September 1, 1990 through October 31, 1990)
38 — (November 1, 1990 through January 23, 1991)

39 — (January 24, 1991 through March 31, 1991)
40 — (April 1, 1991 through May 31, 1991)
41 — (June 1, 1991 through August 31, 1991)
42 — (September 1, 1991 through October 31, 1991)
43 — (November 1, 1991 through February 18, 1992)
44 — (February 19, 1992 through May 31, 1992)
45 — (June 1, 1992 through September 30, 1992)
46 — (October 1, 1992 through February 28, 1993)
47 — (March 1, 1993 through July 31, 1993)
48 — (August 1, 1993 through January 31, 1994)
49 — (February 1, 1994 through July 31, 1994)
50 — (August 1, 1994 through July 31, 1995)
51 — (August 1, 1995 through July 31, 1996)
52 — (August 1, 1996 through May 31, 1997)
53 — (June 1, 1997 through March 31, 1998)
54 — (April 1, 1998 through November 30, 1998)
55 — (December 1, 1998 through January 31, 2000)
56 — (February 1, 2000 through March 11, 2001)
57 — (March 12, 2001 through July 31, 2002)
58 — (August 1, 2002 through July 31, 2003)
59 — (August 1, 2003 through May 31, 2004)
60 — (June 1, 2004 through May 31, 2005)
61 — (June 1, 2005 through December 9, 2006)
62 — (December 10, 2006 through October 15, 2008)
63 — (October 16, 2008 through August 16, 2009)
64 — (August 17, 2009 through July 31, 2010)
65 — (August 1, 2010 through July 31, 2011)
66 — (August 1, 2011 through September 30, 2012)
67 — (October 1, 2012 through September 30, 2014)
68 — (October 1, 2014 through September 30, 2015)
69 — (October 1, 2015 through September 30, 2016)
70 — (October 1, 2016 through December 31, 2018)
71 — (January 1, 2019 through December 31, 2020 )
72 — (January 1, 2021 through May 11, 2022)
73 — (May 12, 2022 through August 14, 2024)
74 — (August 15, 2024 through Present)