Where do you get this data from? I find the icc rankings website rather difficult to navigate and find anything useful like you seem to have.As with the bowlers, you get slightly different results if you take the best average rating for each year.
1902-1904: Clem Hill
1905: Victor Trumper
1906-1909: Clem Hill
1910: Jack Hobbs
1911: Aubrey Faulkner
1912-1928: Jack Hobbs
1929-1931: Herbert Sutcliffe
1932-1947: Don Bradman
1948: George Headley
1949: Denis Compton
1950: Dudley Nourse
1951-1954: Len Hutton
1955: Clyde Walcott
1956-1959: Peter May
1960-1964: Gary Sobers
1965: Ken Barrington
1966-1968: Gary Sobers
1969: Bill Lawry
1970: Doug Walter
1971-1973: Gary Sobers
1974: Glenn Turner
1975: Gundappa Viswanath
1976: Greg Chappell
1977-1978: Viv Richards
1979-1980: Sunil Gavaskar
1981-1983: Viv Richards
1984-1986: Allan Border
1987: Viv Richards
1988: Dilip Vengsarkar
1989-1990: Javed Miandad
1991-1994: Graham Gooch
1995: Brian Lara
1996-1997: Steve Waugh
1998: Sachin Tendulkar
1999: Brian Lara
2000-2002: Sachin Tendulkar
2003: Matthew Hayden
2004: Rahul Dravid
2005: Jacques Kallis
2006-2007: Ricky Ponting
2008-2010: Kumar Sangakkara
2011: Jacques Kallis
2012: Kumar Sangakkara
2013: Hashim Amla
2014-2015: AB de Villiers
2016-2017: Steve Smith
Headley going top in 1948 is a bit of a statistical oddity, since he was never actually rated #1 that year (or indeed ever!).
Peak Marshall was definitely behind peak Imran and pretty similar to peak hadlee. He was a lot more consistent than Imran and arguably more consistent than hadlee, but I think it's how he bowled that mainly cause people to rank him so highly. Pace and variation in combination result in overrating bowlers (not that I particularly think he's overated, even if putting him at number 1).It's pretty absurd that nobody overtook Bradman, even for a short while, during his entire 17 year reign.
The 80s fast bowlers were interesting. Marshall not as far ahead of the pack ratings-wise as popular opinion would have him. Having said that he had more fierce competition than anyone else. The late 70s - 1999 were the golden age of the fast bowler.
I just wrote a script to scrape the data from the relevant web pages.Where do you get this data from? I find the icc rankings website rather difficult to navigate and find anything useful like you seem to have.
In fact Herbert Sutcliffe went to #1 on 6 Dec 1932 after the 1st Test in the bodyline series, and stayed there until 17 Jan 1933 (the 3rd Test). Bradman then stayed top until November 1948*, although he was only 2 points ahead of Hammond after the 2nd Test in 1936-7.It's pretty absurd that nobody overtook Bradman, even for a short while, during his entire 17 year reign.