Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.05248 -0.02646  0.00000  0.01392  0.10429 

Coefficients:
             Estimate Std. Error t value      Pr(>|t|)    
(Intercept)  0.034781   0.005624   6.184 0.00000000593 ***
xNA          0.006974   0.035569   0.196       0.84482    
xnon-Annex I 0.017705   0.006553   2.702       0.00772 ** 
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03512 on 146 degrees of freedom
Multiple R-squared:  0.04779,	Adjusted R-squared:  0.03475 
F-statistic: 3.664 on 2 and 146 DF,  p-value: 0.02801