U.S. Census Bureau

The dataset contains price indexes for single-family houses sold and for single-family houses under construction. The houses sold index incorporates the value of the land and is available quarterly at the national level and annually by region. The indexes for houses under construction are available monthly at the national level.

The international goods and services deficit was $74.6 billion in April, up $14.0 billion from $60.6 billion in March. April exports were $249.0 billion, $9.2 billion less than March exports. April imports were $323.6 billion, $4.8 billion more than March imports. 

The seasonally adjusted annual rate is the seasonally adjusted monthly value multiplied by 12.

The US Presidential election takes place every 4 years and Congressional election happens every 2 years. National elections generally fall into two categories: elections where congressional seats are the highest offices decided and years where voters decide on the office of the President and congressional seats.To avoid confusion with presidential elections, the source refers to non-presidential year elections as “congressional elections" and the data is published at 4 years interval Reference link: https://www.census.gov/library/publications/2015/demo/p20-577.html