please help me analyze these ratios for Costco. what trends can I define, what potentials?

	2020	2019	2018
Liquidity	Aug 30, 2020	Sept 1, 2019	Sept 2,2018
Ratio 1-Current ratio	1.13	1.01	1.02
Ratio 2-Cash ratio	0.54	0.41	0.36
Activity	Aug 30,202	Sep 1,2019	Sep 2, 2018
Ratio 1-Payables turnover	10.23	11.38	10.96
Ratio 2-Inv.turnover	11.84	11.66	11.16
Leverage	Aug 30, 2020	Sep 1, 2019	Sep 2, 2018
Ratio 1-Debt to equity	0.42	0.45	0.41
Ratio 2-Debt to capital	0.29	0.31	0.34
Profitability	Aug 30, 2020	Sep 1, 2019	Sep 2, 2018
Ratio 1-(ROE)	21.89%	24.00%	24.49%
Ratio 2-(ROA)	7.20%	8.06%	7.68%
Market	Aug 30, 2020	Sep 1, 2019	Sep 2,2018
Ratio 1- Price per share earnings	9.07	8.32	7.15
Ratio 2- Market to book ratio	8.76	8.58	7.47