Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.02895 -0.02406 -0.01371  0.00255  0.45567 

Coefficients:
              Estimate Std. Error t value             Pr(>|t|)    
(Intercept)   0.028952   0.002807  10.316 < 0.0000000000000002 ***
xNA          -0.021149   0.010187  -2.076               0.0382 *  
xnon-Annex I -0.015228   0.003643  -4.180            0.0000328 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04696 on 709 degrees of freedom
Multiple R-squared:  0.02604,	Adjusted R-squared:  0.02329 
F-statistic: 9.477 on 2 and 709 DF,  p-value: 0.0000867