How does surveillance in the united states today compared to surveillance in china, according to the sidebar?

China has become the world's biggest market for security and surveillance technology, with analysts estimating the country will have almost 300 million cameras installed by 2020. There are an estimated 30 million surveillance cameras now deployed in the United States shooting 4 billion hours of footage a week. Americans are being watched, all of us, almost everywhere.

Explanation:

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continental currency was denominated in dollars from $​1⁄6 to $80, including many odd denominations in between.