SIR,

Annual Growth Rate((AGR)

Current Decade Total - Previous Decade Total

AGR = ----------------------------------------------------------*100 / Number of Years

Previous Decade Total

For Example:

Years No. of Publications

1971-1980 = 429

1981-1990 = 706

1991-2000 = 1031

2001-2010 = 1391

(706-429) 277 64.57

AGR = ------------- *100 /10 = -------*100 /10 = --------- = 6.46% of 1981-1990

429 429 10

(1031-706) 325 46.03

AGR = ------------- *100 /10 = -------*100 /10 = --------- = 4.60% of 1991-2000

706 706 10

(1391-1031) 360 34.92

AGR = ------------- *100 /10 = -------*100 /10 = --------- = 3.49% of 2001-2010

1031 1031 10

Average Annual Growth Rate (AAGR)

  (Growth Rate in Period A + Growth Rate in Period B + Growth Rate in Period C + ...Growth Rate in Period X)

AAGR = ---------------------------------------------------------------------------------------

Number of Periods

For Example:

6.46% +4.60%+3.49% 14.55

AAGR = -------------------------------------- = ----------------- = 4.85%

3 3

Hi,

If you have the data for the number of publications in 2017, for instance, and you have also the number of publications (in any field or for any country) in 2015 and you would like to measure the growth rate from 2015 to 2017, then you reduce the number of publications of 2017 from that of 2015, and you you divide the result by the number of publications of 2015 and then multiply by 100. The result is in percents.

Example:

Publications in 2015=200

Publications in 2017=300

Then

300-200/200X100

Article Annals of Library and Information Studies (ALIS) Journal: A ...

https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2632&context=libphilprac

Article Trends in Information Management (TRIM) Journal: A Bibliomet...

First you need to compute the corresponding growth for each year, then compute the total sum of the figures of corresponding growth for each year and then divide it by the number of years, that will give you average annual corresponding growth.

Hi,

If you are still interested in this calculation, here is a link to an article exlpaining the growth calculation:

https://www.ucl.ac.uk/~uctpa36/C41_note_growth_accounting.pdf