Britain's economic growth was slower in the mid-1970's and its decline much more rapid in the subsequent recession than the United States.

The economic growth of Britain was slower in the mid-1970's and it declined much more rapidly in the subsequent recession than the United States did.

Britain's economy, which grew more slowly in the mid-1970's, also had declined much more rapidly in the subsequent recession than the United States did.

The economy of Britain grew more slowly in the mid-1970's and declined much more rapidly in the subsequent recession than did the economy of the United States.

Britain's economy grew more slowly in the mid-1970's and its decline was much more rapid during the subsequent recession than the economy of the United States.