Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.055116 -0.029802 -0.004542  0.007468  0.248287 

Coefficients:
              Estimate Std. Error t value     Pr(>|t|)    
(Intercept)   0.004559   0.007526   0.606        0.546    
xNA          -0.004542   0.047600  -0.095        0.924    
xnon-Annex I  0.050560   0.008770   5.765 0.0000000468 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.047 on 146 degrees of freedom
Multiple R-squared:  0.189,	Adjusted R-squared:  0.1779 
F-statistic: 17.01 on 2 and 146 DF,  p-value: 0.0000002285