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According to the latest statistical data released by Nanjing and Zhengzhou Statistical Bureau in 2024, from 1990 to 2021, Nanjing's annual average GDP was $66.32 billion, with an average annual growth rate of 6.68%; Zhengzhou's annual average GDP was $51.55 billion, with an average annual growth rate of 6.72%. In 2020, the GDP difference between Nanjing and Zhengzhou was $40.8 billion, in 2019, the GDP difference between Nanjing and Zhengzhou was $35.2 billion, and in 2018, the GDP difference between Nanjing and Zhengzhou was $41.3 billion.
| Year | Nanjing GDP | Zhengzhou GDP | Difference |
|---|---|---|---|
| 2020 | $214.8 billion | $174 billion | $40.8 billion |
| 2019 | $202.2 billion | $167 billion | $35.2 billion |
| 2018 | $197.9 billion | $156.6 billion | $41.3 billion |
| 2017 | $174.4 billion | $135.9 billion | $38.5 billion |
| 2016 | $158.5 billion | $120.6 billion | $37.9 billion |
| 2015 | $158.9 billion | $119.6 billion | $39.3 billion |
| 2014 | $145.4 billion | $111.7 billion | $33.7 billion |
| 2013 | $130.5 billion | $101.1 billion | $29.4 billion |
| 2012 | $118.3 billion | $91.1 billion | $27.2 billion |
| 2011 | $98.4 billion | $78.7 billion | $19.7 billion |
| 2010 | $77.9 billion | $61.4 billion | $16.5 billion |
| 2009 | $63.4 billion | $49.6 billion | $13.8 billion |
| 2008 | $55.2 billion | $44 billion | $11.2 billion |
| 2007 | $43.9 billion | $33.3 billion | $10.6 billion |
| 2006 | $35.3 billion | $25.6 billion | $9.7 billion |
| 2005 | $29.9 billion | $20.6 billion | $9.3 billion |
| 2004 | $23.5 billion | $16.9 billion | $6.6 billion |
| 2003 | $19.3 billion | $13.5 billion | $5.8 billion |
| 2002 | $15.9 billion | $11.4 billion | $4.5 billion |
| 2001 | $14.1 billion | $10.2 billion | $3.9 billion |
| 2000 | $12.5 billion | $9.1 billion | $3.4 billion |
| 1999 | $11 billion | $7.8 billion | $3.2 billion |
| 1998 | $10.1 billion | $7.6 billion | $2.5 billion |
| 1997 | $9.2 billion | $7 billion | $2.2 billion |
| 1996 | $8.2 billion | $6.2 billion | $2 billion |
| 1995 | $7 billion | $4.8 billion | $2.2 billion |
| 1994 | $5.5 billion | $3.5 billion | $2 billion |
| 1993 | $4.3 billion | $2.6 billion | $1.7 billion |
| 1992 | $4 billion | $2.4 billion | $1.6 billion |
| 1991 | $3.3 billion | $2.2 billion | $1.1 billion |
| 1990 | $3.2 billion | $2.1 billion | $1.1 billion |