Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.044306 -0.030564 -0.002134  0.009035  0.281413 

Coefficients:
              Estimate Std. Error t value Pr(>|t|)    
(Intercept)   0.002150   0.007445   0.289    0.773    
xNA          -0.002134   0.047086  -0.045    0.964    
xnon-Annex I  0.042160   0.008675   4.860 0.000003 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04649 on 146 degrees of freedom
Multiple R-squared:  0.1418,	Adjusted R-squared:   0.13 
F-statistic: 12.06 on 2 and 146 DF,  p-value: 0.00001418