"Between 1990 and 1996, the aparrant drift is about .025 as. In 1996 a decided shift appears with the X Max (outer edge of the red in 1996 of about .025 as since the X Max in 1990. This is a fairly rapid new escalation in the rate of drift."

"The spiral wobble reached maximum size in 1996 and looked normal until 1998 when it hit a bump which caused a dent (which can be seen in the bottom) of the wobble for unknown reasons. Since then the wobble has tightened up into an unusually small circular size and seems to be undergoing another 1930's style radical downsizing and phase-shifting."

[link to www.michaelmandeville.com]