Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.03948 -0.02151 -0.02140  0.00684  0.35946 

Coefficients:
              Estimate Std. Error t value             Pr(>|t|)    
(Intercept)   0.039485   0.003087  12.791 < 0.0000000000000002 ***
xNA          -0.027839   0.011204  -2.485               0.0132 *  
xnon-Annex I -0.017968   0.004007  -4.485           0.00000851 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.05165 on 709 degrees of freedom
Multiple R-squared:  0.03086,	Adjusted R-squared:  0.02812 
F-statistic: 11.29 on 2 and 709 DF,  p-value: 0.00001495