All vs each

Many natural resources are disappearing or being wasted on our planet every day. One of the most important resources we are using badly is our trees. ____ year, hundreds of thousands trees disappear in countries all around the world.

1) Each

2) All

I would go for "each" here. To me, "all year", means "throughout a particular year", as in "He has been annoying me all year". It doesn't mean "every year". " I didn't get a wink of sleep all night" = I didn't sleep last night / that night." It doesn't mean every night.