Determine whether the function represented in each table is one-to-one.

The table shows the number of registered passenger cars in the United States for the years 2008–2012.

Year ..............................................Registered Passenger Cars (in thousands)

2008 ..........................................................................137,080

2009 ..........................................................................134,880

2010 ..........................................................................139,892

2011 ..........................................................................125,657

2012 ..........................................................................111,290