## Loading required package: ggplot2
## Google's Terms of Service: https://cloud.google.com/maps-platform/terms/.
## Please cite ggmap if you use it! See citation("ggmap") for details.
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## Attaching package: 'dplyr'
## The following objects are masked from 'package:stats':
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##     filter, lag
## The following objects are masked from 'package:base':
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##     intersect, setdiff, setequal, union
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## Attaching package: 'jsonlite'
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## [1] "https://data.colorado.gov/resource/tv8u-hswn.json?county=Boulder&$where=age between 20 and 40&$select=year,age,femalepopulation"
## [1] "https://data.colorado.gov/resource/tv8u-hswn.json?county=Boulder&$where=age%20between%2020%20and%2040&$select=year,age,femalepopulation"
##   year age femalepopulation
## 1 1990  20             2751
## 2 1990  21             2615
## [1] "list"
## 'data.frame':    1000 obs. of  3 variables:
##  $ year            : chr  "1990" "1990" "1990" "1990" ...
##  $ age             : chr  "20" "21" "22" "23" ...
##  $ femalepopulation: chr  "2751" "2615" "2167" "1798" ...