Describe how and why each of the ratios has changed over the three-year period. For example, did the current ratio increase or decrease? Why?

	2019	2018	2017
Current Ratio	0.90	1.49	1.40
Debt / Equity Ratio	3.5	3.96	4.31
Free Cash Flow (000)	-$3,140,357	-$2,854,425	-$1,959,250
Earnings per Share	$4.26	$2.78	$1.29
Price / earnings ratio	75.88	96.21	148.33
Return on Equity	24.62%	23.12%	15.60%
Net profit margin	9.26%	7.67%	4.78%
Stock Data Number of Shares Outstanding	438,807	436,599	433,393
Closing Price Last Business Day in December	323.57	267.66	191.96