Bonds	Stocks
2013	1,337,544	191,512
2014	1,485,786	174,601
2015	1,611,250	173,966
2016	1,487,629	138,102
2017	1,807,829	143,996
2018	1,526,272	131,328
2019	1,751,659	168,598

a. Calculate and report the average share of the bonds issuance in the U.S. primary corporate capital market during the analyzed period. What does this number tell your about the relative importance of corporate bonds versus equity in raising new external finance by the U.S. corporations?

b. Formulate one simple lesson based on your analyses of the data and offer some potential explanations behind the observed patterns.