If you have set your tables to "MONITORING", then check:
{ALL|DBA|USER}_TAB_MODIFICATIONS
Code:
SQL> desc ALL_TAB_MODIFICATIONS
Name Null? Type
----------------------------------------- -------- ----------------------------
TABLE_OWNER VARCHAR2(30)
TABLE_NAME VARCHAR2(30)
PARTITION_NAME VARCHAR2(30)
SUBPARTITION_NAME VARCHAR2(30)
INSERTS NUMBER
UPDATES NUMBER
DELETES NUMBER
TIMESTAMP DATE
TRUNCATED VARCHAR2(3)
DROP_SEGMENTS NUMBER
