1981–1984[]
1984–1986[]
1985 (15 years)[]
1986[]
1986–1989[]
1989-1992[]
1990 (20 years)[]
1991 (21 years)[]
1992–1994[]
1994–2001[]
1995 (25 years)[]
2000 (30 years)[]
2001–2003[]
2003–2005[]
2003 (33 years)[]
2005–2008[]
2005 (35 years)[]
2008–present[]
2008–2018[]
2010 (40 years)[]
2015 (45 years)[]
Version #1
Version #2
Version #3