Statistical test for annual crude mortality trend (3 years data=3 data points)

#1
Help,

I have the crude mortality figures for 2015, 2016, 2017 and would like to know if the figure for 2017 is statistically different. The population stayed constant over the time period.

Year Deaths Pop Deaths/Pop
2015 2242 3400000 0.000659412
2016 2366 3400000 0.000695882
2017 2838 3400000 0.000834706


What would be the best test? Is it available in Excel or a common software package?

Thank you