Function that computes the growth-rate series of a given time series.
Examples
compute_gr(gdp_current, 4)
#> Qtr1 Qtr2 Qtr3 Qtr4
#> 1996 6.08867935 5.73366955 6.94101827 6.18686456
#> 1997 5.32681999 5.82833781 5.81264625 7.46501855
#> 1998 6.98155490 7.27951434 7.29008445 6.67717099
#> 1999 8.08741157 7.00562308 6.95832050 6.61438891
#> 2000 9.06819247 8.74976630 8.98005651 8.40994962
#> 2001 8.35264254 8.37426628 8.22058324 8.04739915
#> 2002 6.77166868 7.57023801 6.74191279 6.75074862
#> 2003 7.42351445 6.86315302 7.10328334 6.88637531
#> 2004 6.77696252 7.10300641 7.12200283 7.54900113
#> 2005 7.82270050 8.26277426 7.72777345 7.83441834
#> 2006 8.50975754 8.15453015 8.13385108 8.33167442
#> 2007 7.59546737 7.38800486 6.56169370 7.33162575
#> 2008 4.60891079 4.62357092 3.49269979 0.45317484
#> 2009 -3.58531607 -4.47171250 -3.34082391 -2.78017391
#> 2010 -0.13945870 0.57487679 0.48714645 0.59819611
#> 2011 0.52689199 -0.30509116 -0.81355571 -2.43296975
#> 2012 -2.47403400 -3.65549932 -2.36515908 -3.68960917
#> 2013 -2.12405793 -1.20572806 -0.77565679 0.08553608
#> 2014 0.61601229 0.69904045 1.56383653 2.26817223
#> 2015 3.92026445 4.62423561 4.80097010 5.15049549
#> 2016 3.41225868 3.49451206 3.39643280 2.91170979
#> 2017 3.83693314 4.22874193 4.13297782 4.53170863
#> 2018 3.61508079 3.69190051 3.38047734 3.74782208
#> 2019 4.36985390 3.46733865 2.95875393 2.93721012
#> 2020 -3.45277544 -20.65877496 -7.83749740 -7.43836816
#> 2021 -1.99739321 21.58771832 8.21233576 11.34964963
#> 2022 12.33458843 12.09859711 11.23976250 9.32055904
#> 2023 11.43661303 9.37664582 8.16222021 7.59735073
#> 2024 5.92433536 6.54964911 6.55500425 6.26887302