Postal Letters Sent Per Capita in USA

Postal letters sent per capita reached in 0 in the USA, according to the National Statistical Office. This is ERROR: Undefined index: US0% more than in the previous year.

Historically, postal letters sent per capita in the USA reached an all time high of ERROR: Undefined index: USERROR: asort() expects parameter 1 to be array, null givenERROR: end() expects parameter 1 to be array, null given in ERROR: Undefined index: USERROR: asort() expects parameter 1 to be array, null givenERROR: array_keys() expects parameter 1 to be array, null givenERROR: end() expects parameter 1 to be array, null given and an all time low of ERROR: Undefined index: USERROR: asort() expects parameter 1 to be array, null givenERROR: reset() expects parameter 1 to be array, null given in ERROR: Undefined index: USERROR: asort() expects parameter 1 to be array, null givenERROR: array_keys() expects parameter 1 to be array, null givenERROR: reset() expects parameter 1 to be array, null given.