Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.019444 -0.012646 -0.006267  0.004631  0.259427 

Coefficients:
              Estimate Std. Error t value       Pr(>|t|)    
(Intercept)   0.007367   0.001437   5.127 0.000000380436 ***
xNA          -0.004603   0.005215  -0.883          0.378    
xnon-Annex I  0.012079   0.001865   6.477 0.000000000175 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.02404 on 709 degrees of freedom
Multiple R-squared:  0.06252,	Adjusted R-squared:  0.05988 
F-statistic: 23.64 on 2 and 709 DF,  p-value: 0.0000000001149