How to make a boxplot in R

I'm brand new to R and just trying to 'fumble' my way through it!
I'm trying to create two boxplots of two columns of data.
Col 1 Country, Col 2 2018, Col 3 2019.
16 countries listed and 16 entries for both 2018 and 2019. (e.g. Range 2018 72-2087)
I'm just using boxplot(2018,2019) is that correct?
Why are they flat lines with decimal fractions of years on Y axis?
How do I turn these around?
Any help much appreciated


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