I'm trying to undertake a statistical analysis of some mean proportions of area burnt (Total area burnt vs. areas burnt at various smaller sites within the total area (including an inner and outer buffer area)). So I've got Total vs. Inner Buffer vs. Outer buffer. I've got the means for all these across 7 years, and I want to test for significance within each year and across all years.

I'm looking for advice on what statistical test I could use, and if this is even possible to test for?