Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.04444 -0.04441 -0.00272 -0.00270  0.65483 

Coefficients:
             Estimate Std. Error t value        Pr(>|t|)    
(Intercept)  0.002723   0.004710   0.578           0.563    
xNA          0.004598   0.017094   0.269           0.788    
xnon-Annex I 0.041721   0.006113   6.825 0.0000000000188 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.07881 on 709 degrees of freedom
Multiple R-squared:  0.06346,	Adjusted R-squared:  0.06082 
F-statistic: 24.02 on 2 and 709 DF,  p-value: 0.00000000008045