Percentages of occurances that other information is given in death notices, taken from the 1829 database:

Ages - about 80%
Actual date of death - about 20%
Spouse's name (usually husband) - about 11%
Parent's name - about 8%
Other info (previous residence; military, political or religious connection) about 22%

Percentages of occurances that other information is given in marriage notices, taken from the 1829 database:

Actual date of marriage - about 7%
Residence of one of the parties, other than where event took place - about 10%
Name of parent (usually bride's father) - about 7%