Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.01931 -0.01877 -0.00170 -0.00167  0.46787 

Coefficients:
              Estimate Std. Error t value             Pr(>|t|)    
(Intercept)   0.019312   0.002275   8.490 < 0.0000000000000002 ***
xNA          -0.017833   0.008257  -2.160               0.0311 *  
xnon-Annex I -0.017613   0.002953  -5.965        0.00000000385 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03806 on 709 degrees of freedom
Multiple R-squared:  0.04886,	Adjusted R-squared:  0.04618 
F-statistic: 18.21 on 2 and 709 DF,  p-value: 0.00000001939