Six Months Ended June 30, | Year Ended December 31, | ||||||||||||||||||
2017 | 2016 | 2015 | 2014 | 2013 | 2012 | ||||||||||||||
Earnings: | |||||||||||||||||||
Income before income taxes | $ | 3,816 | $ | 5,136 | $ | 7,342 | $ | 4,637 | $ | 6,674 | $ | 974 | |||||||
Add: Interest expense | 213 | 381 | 341 | 353 | 380 | 393 | |||||||||||||
Add: Interest factor in rental expense | 109 | 229 | 223 | 225 | 192 | 206 | |||||||||||||
Total earnings | $ | 4,138 | $ | 5,746 | $ | 7,906 | $ | 5,215 | $ | 7,246 | $ | 1,573 | |||||||
Fixed charges: | |||||||||||||||||||
Interest expense | $ | 213 | $ | 381 | $ | 341 | $ | 353 | $ | 380 | $ | 393 | |||||||
Interest capitalized | 15 | 14 | 13 | 11 | 14 | 18 | |||||||||||||
Interest factor in rental expense | 109 | 229 | 223 | 225 | 192 | 206 | |||||||||||||
Total fixed charges | $ | 337 | $ | 624 | $ | 577 | $ | 589 | $ | 586 | $ | 617 | |||||||
Ratio of earnings to fixed charges | 12.3 | 9.2 | 13.7 | 8.9 | 12.4 | 2.5 | |||||||||||||