Are homeplanets affected by high/catastrophic events?

[PsychoTechFreak]

Intention of this observation:
Are Master Planets affected by high/catastrophic events?

Setup:
AICampaign 3.02, but with a 4.b events.txt which I have modified with text entries to track the severities of the events.
SE4 Batch (by Master Belisarius), every turn will be saved (with an events.txt for human)
3 Empires, 1 planet start
1 human player set on AI complete on (Eee),
star map midlife med. size (about 60 systems),
Eee are only remaining empire after 125 years, but a lot of other races arose from riots,
Event Percent Chance High := 90

Does anybody know if this could be set to a value greater than 100? I have taken 90 because I am not sure if values higher than 100 could have some overflow effects.

Problems after 100 years, the next 25 years have taken 7 hours because of the 1000s of units, I guess.

Homeplanet name: Arianna I (has not been affected by high/catastrophic events within the first 1250 turns)
A lot of rebellions occur, some of them are even medium severity events, but the HW has not been affected even by medium rebellions.

The only history.txt about events are saved from the human player, so I just have observed the Eee.

The game can be continued, if you think of very rare events that might come after 500 years or such. But as I have stated above, 250 turns take 7 hours from now on.

I can provide savegames of every turn. Following Posts are a list of all catastrophic events and then high events (just for the Eee).