| Year | Total Investment (₹ in Lakhs) |
| 2025 | 17953.27 |
| 2024 | 18282.73 |
| 2023 | 17637.4 |
| 2022 | 15679.58 |
| 2021 | 13822.41 |
| 2020 | 12835.66 |
| 2019 | 12719.63 |
| 2018 | 11591.73 |
| 2017 | 7696.63 |
| 2016 | 8016.78 |
| 2015 | 8967.3 |
| 2014 | 4342.91 |
| 2013 | 7528.74 |
| 2012 | 6709.46 |
| 2011 | 7441.41 |
| 2010 | 7687.72 |
| 2009 | 6606.86 |
| 2008 | 5804.26 |
| 2007 | 5312.04 |
| 2006 | 5400.43 |
| 2005 | 4746.73 |
| 2004 | 5069.39 |
| 2003 | 4426.77 |
| 2002 | 4344.1 |
| 1992 | 301.4 |
| 1982 | 43.25 |
| 1972 | 3.66 |
| 1962 | 0 |