Triggers missing after upgrading from 11.5.9 to 11.5.10.2

After upgrading to 11.5.10.2, I see only one trigger:  DR$PER_ADDRESSES_N4TC ENABLED 

What happened to the rest?  How do I get them back? 

Here is the list of triggers that were in 11.5.9 on a HR table:

SELECT trigger_name, status
FROM dba_triggers
WHERE table_name = 'PER_ADDRESSES';

TRIGGER_NAME STATUS
GHR_PER_ADDRESSES_AFIUD ENABLED
HR_PA_MAINTN_ADDR_HIST_BRU ENABLED
PER_ADDRESSES_AI ENABLED
PER_ADDRESSES_AT ENABLED
PER_ADDRESSES_AU ENABLED
PER_ADDRESSES_AC ENABLED
PER_ADDRESSES_AD ENABLED
PER_ADDRESSES_OVN ENABLED
PER_ADDRESSES_WHO ENABLED
HR_PA_MAINTN_ADDR_HIST_BRI ENABLED