context: Prior to the creation of the Delhi Durbar, Gateway of India 1 was built to commemorate the arrival of King George Five and Queen Mary Mumbai. But they were only able to see the cardboard model of this architecture, as construction began after 9. The final design was approved on March 7, 2005. The gateway was made of yellow basalt and concrete. [12] Foundation work was completed in 122 and the work was completed in 129. [13] The Viceroy of the Earl of Reading opened the gateway on December 9, 126. [6]
question: How many years since the start of the construction of the Gateway of India in Mumbai, West Maharashtra, India?