A Comparison of Goals Scored in Group Games in the 2010 and 2014 FIFA World Cups

Introduction

101 goals were scored in the 48 Group games at the 2010 World Cup (42 goals in the First Half, 59 goals in the Second Half).
136 goals were scored in the 48 Group games at the 2014 World Cup (52 goals in the First Half, 84 goals in the Second Half).

Goals Scored in 15 Minute Blocks

I have reworked my goal scoring data from 2010 when I looked at goals scored in quarters of games.
This is a comparison between both sets of Group games:

My record of these goals:

Photo Credits

Argélia X Coreia do Sul (Gilmar Mattos, CC BY-NC-SA 2.0)

Penalty shootout (Jason Bagley, CC BY-SA 2.0)