2005 EGD rating distribution

EGD Rating distribution

Year:  

1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |

Revised rating distribution

Year:  

1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |

The horizontal axis shows the go rating scale used by the EGD and the revised rating system.
The vertical axis shows the number of tournament games played by players of a declared rank in the selected year.

The colored lines from yellow to blue are rating distributions, colored per declared grade.

When looking at the EGD distributions, it seems that over the years, many players graded around 1k (between 6k and 5d) see their rating getting significantly lower than their grade.
In recent years, this trend seems to be reversed a bit, but this could be due to players finally complying to the rating system and demoting themselves.
But I suspect this is an artifact of the parameter values of the EGD system.

When choosing different parameter values (based on observations), the picture changes.