You did not specify what government you are talking about, but I can assure all governments have some secrets, as they deal with monetary, health care, and other business secrets that need to be undisclosed for the benefit of the people.
I do not think there is an exhaustive list to how many secrets one government has, but if you count all the business secrets together with the confidentialities you get thousands of individual secrets.
500000 **Impossible to answer because of government secrets.
Espionage
Why yes, there are secrets of the world. Such as the great Wonders of the world. Government cover-ups, scandals, hidden treasures: All secrets.
No secrets
Some people believe the government is keeping secrets from us others don't.I think they are.A.F. Richards
The Secrets of Love has 176 pages.
Trading Secrets has 233 pages.
The Secrets of Vesuvius has 224 pages.
Secrets in the Fire has 168 pages.
Secrets of the Clans has 176 pages.
Secrets of the Morning has 405 pages.
Grave Secrets has 448 pages.