WASHINGTON, March 23 (CNN) - At least 16 states across the US have issued stay-at-home orders in response to the coronavirus pandemic.

More than 100.5 million people -- about 31% of the national population -- are currently under restrictions, according to US Census population estimates.

But not all orders have been activated yet -- when all 16 state orders go into effect, more than 142 million people will be affected, or 43% of the country.

Apart from statewide orders, several individual cities and counties like Atlanta, Georgia, have also issued their own stay-at-home orders.

These states have issued stay-at-home orders:

California: started Thursday
Illinois: started Saturday
New Jersey: started Saturday
New York: started Sunday
Louisiana: started Monday
Connecticut: started Monday
Washington: started Monday
Ohio: started Monday
Oregon: started Monday
New Mexico: effective Tuesday
Massachusetts: effective Tuesday
Delaware: effective Tuesday
Michigan: effective Tuesday
West Virginia: effective Tuesday
Indiana: effective Tuesday
Hawaii: effective Wednesday