The number of British visitors to the US and American visitors to the UK from 2011 to 2015 is shown by the first column chart. The second one shows the amount spent by those visitors in that period.
Look at the first chart, we can see that the number of UK tourists to US and US tourists to UK in 2015 was highest and the lowest was in 2013. Because of the highest tourists, the outlay of UK tourists and US tourists in 2015 was the highest. The lowest outlay of UK tourists was in 2011 but the amount spent of US tourist was lowest in 2011 and 2013.
The number of UK tourists to US was reduced a bit from 3500 to 3000 between 2011 and 2013 then increased quickly to 4000 in 2015. Difference a little UK tourists, the figure of US tourists increased but not significantly about 3000 in 2012 and plummeted to 2000 in 2013 then increased sharply to more than 3000 in 2015. The amount spent of UK tourist was increased quickly from 4000 to 6000 between 2011 and 2015. The outlay of US tourist almost unchanged from 2011 to 2013 and increased quickly from 3000 to 4000 between 2013 to 2015.