y = 8.615/(1 + e^(-(x-(6.429))/6.198))
Inital zero points added:0
Inflexion point of curve:1994
acceleration counts pred pred_actual velocity y_norm year
0 0.021 2 2.254 12.352 0.269 0.868 1987
1 0.019 5 2.533 17.637 0.289 1.455 1988
2 0.017 47 2.831 25.330 0.307 3.421 1989
3 0.014 116 3.146 35.910 0.322 4.288 1990
4 0.010 180 3.474 50.589 0.334 4.721 1991
5 0.006 141 3.813 72.216 0.343 4.471 1992
6 0.002 154 4.159 104.326 0.347 4.543 1993
7 -0.003 116 4.506 151.763 0.347 4.240 1994
8 -0.007 138 4.850 219.755 0.342 4.390 1995
9 -0.011 215 5.188 312.746 0.333 4.816 1996
10 -0.014 233 5.515 444.801 0.320 4.872 1997
11 -0.017 449 5.828 629.433 0.304 5.491 1998
12 -0.019 514 6.123 870.533 0.286 5.597 1999
13 -0.021 1103 6.398 1211.848 0.266 6.305 2000
14 -0.021 1715 6.654 1629.884 0.244 6.704 2001
15 -0.022 2368 6.887 2122.973 0.223 6.996 2002
16 -0.021 3282 7.099 2764.058 0.202 7.271 2003
17 -0.020 4634 7.290 3528.344 0.181 7.563 2004
18 -0.019 6041 7.461 4406.325 0.161 7.777 2005
19 -0.018 6421 7.613 5339.928 0.143 7.798 2006
20 -0.016 7004 7.747 6327.936 0.126 7.849 2007
21 -0.015 7944 7.865 7430.578 0.110 7.932 2008
22 -0.013 9500 7.969 8493.132 0.096 8.081 2009
23 -0.012 10301 8.059 9643.923 0.084 8.125 2010
24 -0.010 11310 8.137 10887.364 0.073 8.175 2011
25 -0.009 12384 8.205 12271.831 0.063 8.214 2012
26 -0.008 12522 8.264 13519.941 0.054 8.187 2013
27 -0.007 10119 8.314 11263.279 0.047 8.207 2014
28 -0.006 1118 8.358 1564.623 0.040 8.022 2015