Executive Overview of Results – Fiscal Years Ended June 1, 2019, June 2, 2018, and June 3, 2017 Our operating results are significantly affected by wholesale shell egg market prices and feed costs, which can fluctuate widely and are outside of our control. The majority of our shell eggs are sold at independently quoted wholesale market prices for shell eggs or formulas related to our costs of production which include the cost of corn and soybean meal. The following table shows our net income (loss), gross profit, net average shell egg selling price, the average Urner Barry wholesale large shell egg prices in the southeast region, and feed cost per dozen produced for each of our three most recent fiscal years. The shell egg industry has historically been subject to periods of high profitability followed by periods of significant loss. The periods of high profitability have often reflected increased consumer demand relative to supply while the periods of significant loss have often reflected excess supply for the then prevailing consumer demand. Historically, demand for shell eggs increases in line with overall population growth. As reflected above, our operating results fluctuate with changes in the spot egg market quote and feed costs. The net average shell egg selling price is the blended price for all sizes and grades of shell eggs, including non-graded shell egg sales, breaking stock and undergrades. In fiscal 2017, our net average selling price and dozens sold decreased over the previous fiscal year primarily due to the oversupply of eggs resulting from the repopulation of the national flock of laying hens to levels exceeding the flock size prior to the avian influenza outbreak in 2015, along with a reduced demand for egg products. In fiscal 2018, strong demand resulted in an increase in our average selling price and dozens sold, and feed costs decreased over prior years. Fiscal 2019 saw an increasing U.S. flock size result in oversupply of eggs, particularly in the last half of the fiscal year. This resulted in decreased gross profit and net income for fiscal 2019. NET SALES Net sales for the fiscal year ended June 1, 2019 were $1,361.2 million, a decrease of $141.7 million, or 9.4%, from net sales of $1,502.9 million for fiscal 2018. The decrease was primarily due to lower selling prices for non-specialty eggs in fiscal 2019 due to the oversupply of eggs, particularly in the last half of the fiscal year, contrasted with fiscal 2018 in which we experienced strong demand resulting in higher prices for non-specialty eggs. In fiscal 2019, shell egg sales made up approximately 97% of our net sales. Total dozens sold in fiscal 2019 were 1,038.9 million, an increase of 1.2 million dozen, or 0.1%, compared to 1,037.7 million sold in fiscal 2018 resulting in an increase in net sales of $1.7 million for fiscal 2019 compared with the prior year. Net average selling price of shell eggs decreased from $1.397 per dozen for fiscal 2018 to $1.265 per dozen for fiscal 2019, a decrease of $0.132 per dozen, or 9.4%, primarily reflecting an abundance of eggs in the market. The decrease in sales price in fiscal 2019 from fiscal 2018 resulted in a corresponding decrease in net sales of approximately $137.1 million. Our operating results are significantly affected by wholesale shell egg market prices, which are outside of our control. Small changes in production or demand levels can have a large effect on shell egg prices. Egg products accounted for approximately 3% of our net sales. These revenues were $41.5 million for the fiscal year ended June 1, 2019 compared with $43.5 million for the fiscal 2018.

Fiscal Year ended	June 1, 2019	June 2, 2018	June 3, 2017

Net income (loss) attributable to Cal-Maine Foods, Inc. - (in thousands)	$54,229	$125,932	$(74,278)

Gross profit (in thousands)	222,859	361,046	45,550

Net average shell egg selling price (rounded)	1.27	1.40	1.01

Average Urner Barry Spot Egg Market Quotations 1	1.23	1.49	0.85

Feed cost per dozen produced	0.415	0.394	0.399

Question: What is the percentage increase / (decrease) in average Urner Barry Spot Egg Market Quotations 1 in 2019 compared to 2018?
Answer: -17.45