On the 29 of may 1999 Nigeria celebrate it's Democracy day under the lead administration of"

12. General Olusegun Obasanjo became the President the second time, He was born on the 5th of May 1937) is a former Nigerian Army general who was

President of Nigeria from 1999 to 2007. Obasanjo was a career soldier before serving twice as our nation's head of state. He served as a military ruler from 13 February 1976 to 1 October 1979, and as a democratically elected president from 29 May 1999 to 29 May 2007. From July 2004 to January 2006, Obasanjo also served as Chairperson of the African Union. 

He attend to the Nations Economic growth and debt payment duly, Before Obasanjo's administration, Nigeria's GDP growth had been painfully slow since 1987, and only managed 3 per cent between 1999/2000. However, under Obasanjo the growth rate doubled to 6 per cent until he left office, helped in part by higher oil prices. Nigeria's foreign reserves rose from $2 billion in 1999 to $43 billion on leaving office in 2007. He was able to secure debt pardons from the Paris and London club amounting to some $18 billion and paid another $18 billion to be debt free. 

13. Umaru Musa Yar'Adua (16 August 1951 – 5 May 2010) was. follow link
https://asehappen.com/2017/09/18/a-call-for-a-new-nigeria-to-make-our-nation-great-part-3/