From the text, please extract and list Nokia's market capitalization timeline.

Context: Nokia is a public limited liability company and is the oldest company listed under the same name on the Helsinki Stock Exchange, beginning in 1915. Nokia has had a secondary listing on the New York Stock Exchange since 1994. Nokia shares were delisted from the London Stock Exchange in 2003, the Paris Stock Exchange in 2004, the Stockholm Stock Exchange in 2007 and the Frankfurt Stock Exchange in 2012. Due to the acquisition of Alcatel-Lucent in 2015, Nokia listed its shares again on the Paris Stock Exchange and was included in the CAC 40 index on 6 January 2016 but later removed on 18 September 2017.

In 2007, Nokia had a market capitalization of €110 billion; by 17 July 2012 this had fallen to €6.28 billion, and by 23 February 2015, it increased to €26.07 billion. Nokia market cap at 2020 was 21.76 billion.

Answer: Here is a timeline of Nokia's market capitalization:
1. 2007 - 110 Billion Euros
2. 2012 - 6.28 Billion Euros
3. 2015 - 26.07 Billion Euros
4. 2020 - 21.76 Billion Euros